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Presented below is the Great Crusade Chronology, an exhaustive listing of all known campaigns that occurred during the nearly two centuries-long Great Crusade that began in 798.M30 and ended with the outbreak of the galaxy-wide Horus Heresy in the early years of the 31st Millennium. At its height, the great expansion of the Imperium of Man consisted of 4,287 primary Expedition Fleets engaged upon the business of enforcing Imperial Compliance and extending the Imperial aegis across the galaxy, as well as 60,000+ secondary deployment groups involved in regulating Compliance or Imperial occupations. By no means is this list complete, as much of the information presented in various canon sources is often ambiguous and even, at times, contradictory. Therefore, this is merely a rough guide to the chronological order of the events, as they occurred, during this conflict.

ChronologyEdit

Presented below, is a chronological listing of events of the Great Crusade. The following information was compiled by manifold and diverse hands at the order of Emperor and the Acting Council of Terra. Many of the dates listed in this chronological compilation are approximations as Imperial records from this time are too fragmentary to be wholly reliable. As more information is uncovered in newly discovered Imperial records, it will be added to the chronology:

Late 700s-800s.M30Edit

Date
Event
Participating Force(s)
Location
Notes
ca. 750.M30 The Primarch Project Emperor of Mankind & Mankind's greatest scientists Terra, Himalazian Mountains underground facility The Primarch Project, which was initially begun in the 29th Millennium, far beneath the surface of Terra, marked the Emperor of Mankind's attempt to begin the creation of the next generation of Imperial super-soldiers. These were the Primarchs, twenty extraordinary individuals who would be His generals -- great leaders who would conquer thousands of worlds in his name. Through the machinations of Chaos, the Primarchs were stolen while still in their gestation tubes and scattered across the galaxy. But all was not lost, as the Emperor still possessed their gene-sequences, which he utilised as the genetic templates for his Legiones Astartes. Accelerated gene-culturing techniques are implemented, reducing processing time for the creation of a Space Marine to one solar year, however, this accelerated gene-seed has unseen fundamental flaws.
ca. 780.M30 The First Founding Legiones Astartes Terra Utilising the genetic material from the stolen Primarchs, the Emperor creates gene-seed and implants it into his already elite, Terran soldiers. They provide the genesis of His Legiones Astartes. The 20 original Space Marine Legions are created during the First Founding. Grabiya's Theorem posits the solution to solve the diminishing stability of the Space Marines' gene-seed stores through over-use, due to the rapid expansion of the nascent Imperium of Man by the Legiones Astartes in this era. This theorem demonstrated that a Primarch's genetic code could be used to stabilise and expand existing Astartes gene-seed stocks with what was hoped to be "minimal deviation" and mutation from the baseline genetic code. Sorian's Inductus Excelsus shows that the requirements for more warriors was vast. Accelerated gene-culturing techniques implemented, reducing processing time to create a Space Marine to one year. However, accelerated gene-seed has unseen fundamental flaws.
ca. 790.M30 First Pacification of Luna VII, XIII and XVI Legions vs. Selenar Gene-Cults of Luna Luna This early Imperial campaign was the first operation mounted by elements of the early Space Marine Legions beyond the skies of Terra while the Terran Unification Wars were still raging across the surface of Mankind's birth world. The combined force of the VII, XIII and XVI Legions (later respectively named the Imperial Fists, Ultramarines and Luna Wolves) lifted from the surface of Terra in a scattering of rocket flame. The as yet unnamed XVI Legion had been chosen to serve as the Space Marine force's vanguard, and had brought its full strength to bear. In a daring surprise assault the XVI Legion launched a planetary strike while their brother Legions drew fire from Luna's defensive weapons. Within six hours of the first shot being fired, Luna had been pacified and brought into Imperial Compliance, the first off-world conquest of the Imperium of Man. Faced with annihilation, the surviving Selenar cultists bent the knee instead, their surrender communique transmitted to Terra calling for the Emperor to "call off his wolves". The XVI Legion earned their name--the Luna Wolves.
ca. 790.M30 Incaladion Conflict Taghmata Omnissiah, Mechanicum & Titans of Legio Fureans vs. Xenos Incaladion Around fifty standard years before the Great Crusade would finally reach the Forge World of Incaladion, after a particularly brutal series of incursions and raids, the Taghmata Omnissium -- the feudal order upon which the defence and military hierarchy of a Forge World of the Mechanicum is based -- finally broke down. In the ensuing strife, the Preceptor-General of Incaladion was assassinated and the Forge World split into warring or isolationist factions, bereft of central control or co-ordination, laying it open to invasion and the devastation which followed. By the time the Great Crusade's advance elements reached Incaladion, it was a global battleground, disported by a dozen different armies; Mechanicum, Renegade and xenos unleashing atomic fire and yet more savage weapons upon each other. During this time, overwhelmed and vastly outnumbered, the Legio Fureans refused to retreat or retrench, and shattered its blade on foes uncounted until it became only a shadow of its former might, reduced to defending the last forge-fane of its dead regent.
798.M30 Departure of the Great Crusade I-XIX Legions Terra Following the successful conclusion of the Terran Unification Wars on Old Earth, the Emperor launched his intergalactic quest to reunited the disparate worlds of mankind, to reunite them into one vast known as the Imperium of Man and usher in a new golden age for all humanity.
ca. 798.M30 Pacification of the Boetian Lowlands XV Legion & Imperialis Auxilia forces vs. the forces of Boetia Terra When the XV Legion was created they were used to quell the few pockets of isolated resistance to the Emperor's rule that remained on Terra during the waning years of the Wars of Unification. Boetia was a nation that had existed since the Age of Strife and was chiefly known for holding out against the Unification for a considerable period of time until it was finally forcibly incorporated in the newborn Imperium. When Imperial Army forces were forced to invade their province the Astartes of the XV Legion were sent in to finally crush any further resistance in a brilliant campaign that lasted only six weeks. Shortly after achieving this objective, the XV Legion was formally named the Thousand Sons by the Emperor Himself and was sent out into the galaxy as part of His Great Crusade.
ca. 798.M30 The Unheard War VII Legion contingent vs. Solar Pirates Azurite Stations on Uranus This terrible conflict was fought in the Azurite Stations of Uranus in the days before the Great Crusade broke the bounds of the Sol System. Named for the corroded blue of the inner surfaces of their hulls, the Azurite Stations were a linked crescent of void citadels, home to a collection of artisans and near-space scavengers. The newly Compliant Azurites turned to fueling the Great Crusade as conscripts for the ships of the Armada Imperialis. But soon they faced a threat in the form of the Solar Pirates -- remnants of a confederation of renegades and mutants. Soon war raged, as the moons of Neptune were embroiled in conflict. The VII Legion heard the cries of the Azurites and assaulted the void stations. 50 Legionaries made their way inside where the Solar Pirates had fortified themselves. Sensing defeat, the Pirates released a psy-plage -- an ancient weapon thought eradicated during the Unification Wars. In a heroic display of bravery, the Imperial Fists sacrificed themselves, so as not to allow the psy-plague to escape the confines of the void station, by overloading the reactors, causing the void station to explode. The "Screaming" was never visited on Mankind again, and it is said that when the Emperor heard of the sacrifice of the fifty Imperial Fists, He ordered the newly-raised Bell of Lost Souls in the Imperial Palace tolled for the first time.
Unknown Date.M30 Cerberus Insurrection War Hounds Legion & Imperialis Auxilia Regiment vs. Rebellious Prisoners Cerberus The newly dubbed War Hounds were tasked alongside the Terran XXIIth Dracos Regiment of the Imperial Army to subdue the asteroid prison colony of Cerberus which had risen up in anarchic revolt in a state of near continuous rioting and mob violence. Initial attempts to impose order by Terran troops had been thrown back in disarray as it became apparent that among the insurrectionists was a renegade cadre of outlawed Thunder Warriors, long believed dead, calling themselves the Dait'Tar. With many of the Space Marine Legions already assigned to the first Expeditionary Fleets of the Great Crusade and en route to the stars, the Emperor Himself dispatched His War Hounds to Cerberus with explicit instructions to reclaim Cerberus colony and carry the Emperor's wrath to those that had defied Him. Within five hours, a signal was received from Praetor-Commander Calyb Hax of the XII Legion that Cerberus-Primary had been returned to Imperial Compliance.
ca. 800s.M30 The Consus Drift Compliance VII Legion contingent Consus Drift The Consus Drift was a belt of stellar debris connected together by tunnels made from the metal entrails of shipwrecks. Billions of humans who had been stranded for millennia, made these asteroids their home. The Imperium discovered the Consus Drift by accident, when the 3rd Expeditionary Fleet, under the command of the VII Legion, was caught in the stellar phenomenon, known as the Mirror Race, and thrown into that region. They were soon set upon by the Drift Clans -- humans schooled and blooded in the brutal arts of void warfare. Thought the Driftborn fought well, they were no match for the transhuman Legionaries. The commander of the VII Legion gave the people of the Consus Drift an ultimatum: Imperial Compliance or extermination. The Clan Warriors immediately surrendered. The 3rd Expeditionary Fleet left after repairs were made, but not before the Imperial Fists had taken the youngest and strongest male warriors of each of the Drift Clans. Of those who survived initiation into the VII Legion, all were inducted into a single unit; the 356th Company, whose reputation for excellence in out-hull void warfare and starship assaults was without peer.
ca. 803.M30 The 'The Flesh Change' XV Legion N/A The XV Legion begins to display powerful psychic abilities, which was a welcome development for its Astartes as they sought to further emulate the Emperor. Throughout the long campaigns, the Thousand Sons made extensive use of sorcerers, and their Warp-derived powers would leave whole populations in thrall to their will rather than carrying out a planetary conquest through a costly full frontal assault like the other Space Marine Legions. But soon, the Legion's joy at their psychic gifts turned to revulsion and horror as a wave of ghastly, degenerative mutations began to affect large portions of the battle-brothers of the XV Legion. These mutagenic changes began to be called the 'Flesh Change' by the Legionaries, and were much feared, as the spiral of degenerative mutation ultimately reduced a proud XV Legion warriors into a mindless mutant abomination that would later be recognised by the Imperium as a gibbering Chaos Spawn. The number of active Astartes within the XV Legion soon began to dwindle to dangerously low levels as a result of the ravages of the Flesh-Change.
803.M30 Discovery of Paramar System Expeditionary Fleet of Rogue Trader DeAniasie Paramar System This unusual trinary star system which possesses vast mineral wealth amid its thirty-seven recorded main satellites, was identified and entered into the Carta Imperialis by the Rogue Trader Hel DeAniasie in 803.M30. Being located in an unusually stable Warp-synchronous location in space, the Paramar System quickly became a way point for the Imperium's expansion into the Segmentum Obscurus.
Unknown Date.M30 The Hunting of the Ak'Haireth Luna Wolves & VIII Legion vs. xenos Ak'Haireth Western reaches of the Segmentum Solar An alien menace known as the Ak'Haireth or 'Bone Drinkers' were initially encountered in the early years of the Great Crusade in the western reaches of the Segmentum Solar. These fungoid, predatory and parasitic life forms were fuelled by the slow and agonisingly painful siphoning of nutrition from living animals, primarily human bone marrow. They inhabited the scavenged void ships of other species and raided isolated colonies and Feral Worlds unable to resist their predations. They were subjected to extermination pogroms carried out both the Luna Wolves and the VIII Legion (not then yet formally known as the Night Lords) which had been thought to have been successful.
ca. 805.M30 Treaty of Mars Emperor of Mankind's Principia Imperialis Fleet & Martian Mechanicum Mars The Emperor of Mankind came to Mars and landed atop the great volcano of Olympus Mons. At their first sight of the Master of Mankind many Tech-priests were overcome with the feeling that they had met the living embodiment of the Omnissiah, the Machine God clad in human form. In return for peace between Terra and Mars, the recognition of the Tech-priests' right to practice their faith and their right to maintain control over both Mars and the other Forge Worlds they had settled, the Mechanicum agreed to build Imperial starships and provide all of the war materiel necessary for the Emperor's Great Crusade. In addition, the Mechanicum agreed to be bound by the Emperor's commandment to never develop certain forbidden technologies such as "Abominable Intelligence" (artificial intelligence). With the signing of this agreement, known as the Treaty of Mars or the Treaty of Olympus Mons within the Mechanicum, the Cult Mechanicum became the Mechanicum of the newly-forged Imperium of Man, and the Palatine Aquila was refashioned to bear two heads, one for Terra and one for Mars.
ca. 805.M30 Discovery of Primarch Horus Lupercal Emperor of Mankind's Principia Imperialis Fleet Cthonia During the early years of the Great Crusade, the future Primarch of the XVI Legion was discovered upon the barren and impoverished feral Mining World of Cthonia by one of the first expeditionary fleets to leave the Sol System. Highly creditable claims state that the Emperor found Horus, the first of his lost sons, but no source specifies where, or the location of this finding. Surrounded in millennia of myths and allegory, the truth of Horus' origins will more than likely never be known.
ca. 805.M30 Siege of Reillis Luna Wolves, Legio Custodes, Imperialis Auxilia & Mechanicum assets Unknown World The Emperor and Horus Lupercal fought together on many occasion during the early years of the Great Crusade. At the fortified city of Reillis, a human settlement unwilling to accept the Emperor's Imperial Truth, the defending army used secret tunnels to infiltrate behind the besieging Imperial Army and hundreds of shock troops swamped the Imperial's command encampment. Unprepared and unarmoured, the Emperor and Horus fought back to back until a plasma blast stunned the young Primarch and sent him staggering to the ground. The Emperor stood over his son and refused to give ground until reinforcement arrived to drive their attackers back.
ca. 806.M30 The Gorro Hollowing Luna Wolves, Legio Custodes, Imperialis Auxilia & Mechanicum assets Gorro Within the Telon Reach was an Ork empire that rivalled that centred on Ullanor, and at its heart was the scrap world of Gorro. Capable of generating destructive yields of terrifying potency, the Emperor decreed that Gorro must be destroyed. Leading the assault Himself, the Emperor and his dutiful and favoured son Horus, at his side, teleported into the subterranean tunnel network deep within the strata of the scrap planet. As the Space Marines attacked, the Ork resistance they faced was nearly overwhelming. At the height of the battle, the Emperor was split from the rest of his forces, and came face-to-face with an Ork of monstrous size, larger than any encountered by Mankind in its long history, and snatched the Emperor from the ground in its massive bionic claw. As the creature's grasp closed to throttle the Master of Mankind, Horus stormed through the press of battle and cut the Ork's arms from its body with a single blow. Together father and son led their forces deeper into the vast sphere of scrap until they reached the centre of Gorro, and caused the scrap world to implode upon itself after they sabotaged its self-sustaining Warp-fold envelope.
806.M30 Compliance of the Osiris Cluster XIII Legion, Imperialis Auxilia & Mechanicum assets vs. Osiris Cluster Osiris Cluster In the eighth year of the Great Crusade, the expeditionary fleet of the XIII Legion discovered the Osiris Cluster, a grouping of eleven star systems that made up the inner portion of the Segmentum Solar's second quadrant. The inhabited worlds of this region, many technologically advanced at contact, were brought into Imperial Compliance in relatively bloodless order. It was viewed as a highly successful campaign in which the XIII themselves had a hand.
807.M30 Compliance of 02-34 (Rust) Emperor of Mankind's Principia Imperialis Fleet, X Legion, Imperialis Auxilia & Mechanicum assets vs. Orks of the 'Krooked-Klaw' Empire Rust The third large-scale engagement of the X Legion -- the invasion of the planet designated 02-34 (or the "Battle of Rust" as it would be commonly known to Imperial military historians) -- showed the X Legion's particular martial gifts for what they were, and would do so with empathic force. Planet 02-34, or 'Rust' to give its colloquial name, was an arid-waste world, rich in pyro-chemical deposits, oxide deserts and the corroded remnants of vast, long-dead cities. The Orks of the powerful and expanding "Krooked-Klaw" empire of Wardog Kulo, spanned more than sixty inhabited star systems to the galactic north-east of Seraphina, making Rust a slave-mining colony comprising millions of Orks and a vast, shifting population of short-lived human slaves harvested in inter-stellar raids. Scouted out by Rogue Trader Hedrik Zuckerman and identified as a primary target of the early Great Crusade, it was into this alien domain that the combined forces of the Legions, with the Emperor at their head, slammed with devastating force in 807.M30 in what was, at that early stage, the most widespread mass offensive. Under the generalship of their then-Legion commander, Lord Commander Amadeus DuCaine, the X Legion formulated a plan of attack which owed much to the feared and pitiless battle-craft of Old Albia; a tactic known as the Hammer and the Storm. After days of continuous fighting, though they had not lost the will to fight, the Orks of Rust simply ran out of blood and machinery to spend. At the end of the battle, the X Legion had suffered less than a fifth of its number in fatalities; a far lower figure than might have been expected. Rust was hailed as a great triumph also on account of how little had been sacrificed to attain it.
ca. 807.M30 Discovery of Primarch Leman Russ Emperor of Mankind's Principia Imperialis Fleet Fenris During the early years of the Great Crusade, the future Primarch of the VI Legion was discovered upon the inhospitable and icy Death World of Fenris. As a foundling, the infant Primarch had been raised by wild wolves, and once he grew to maturity, conquered the various barbarian tribes of his world, becoming its master. Knowing he would never willingly bow to anyone, the Emperor challenged the Wolf King to a series of contents and soundly beat the young Primarch, who bent his knee in service to the Emperor.
ca. 800s.M30 War in the Shedim Drifts Luna Wolves & Titans of the Legio Atarus, Legio Mortis, Legio Fureans & Legio Osedax vs. Eldar Anark Zeta During the war in the Shedim Drifts against the marauding Eldar of Craftworld Mór-ríoh'i, a vast Imperial force comprised of no less than four Titan Legions were assembled and placed under the overall command of Commander Horus Lupercal and his Luna Wolves Legion. The apocalyptic battle which raged upon the planet's surface saw a full demi-Legio of the Legio Atarus encircled and all but destroyed. The Lupercal had cruelly used them, without their foreknowledge or consent, as a ruse to divert the strength of the enemy away from the direct defence of their craftworld while his Legion undertook a surprise assault against it. The war of the Shedirn Drifts was a great victory for Horus and all those of the Imperium who fought in the campaign gained glory because of it, but at the expense of the Legio Atarus, an injury that the Firebrands would not forget.
ca. 810.M30 Discovery of Primarch Ferrus Manus Emperor of Mankind's Principia Imperialis Fleet Medusa The Emperor comes to the Feral World of Medusa to reunite with his son Ferrus Manus. Not long after their reunion, Manus takes command of the X Legion and remakes them in his image, renaming them the Iron Hands.
813.M30 Mezoa joins the Imperium Unknown Mezoa Founded first as an outpost of the Lucien Mechanicum in 540.M30 before the Great Crusade, before rapidly gaining status as an independent Forge World in its own right in 813.M30. This war-world was dedicated solely to the production of heavy arms and armour. The Mezoan forges were built under the direction not only of the Archimandrites of the Cult Mechanicus, but also the minds of both the Emperor and, it was said, the Primarch Ferrus Manus in later years after joining the Imperium.
824.M30 Contact with Lethe Expeditionary Fleet of Rogue Trader Elgin Lethe Lethe was first contacted in 824.M30 by the Rogue Trader Vaspperly Elgin, ahead of the Great Crusade's advance in force into the Coronid Deeps region some years later. Used as an early staging point by Crusade fleets, Lethe later served its part within the Imperial fold, providing several elite pioneer light infantry cohorts for the Imperialis Auxilia.
ca. 829.M30 Proximan Rebellion III Legion vs. Rebel Proximans Proxima The Proximan Rebellion is one of the earliest recorded engagements of the as-yet unnamed III Legion. Assigned to the Imperial Compliance ceremonies and as the Emperor's honour guard for Proxima's formal accession into the Imperium, an insurrectionist trap was sprung which resulted in the III Legion's XVIth Cohort (Chapter) fighting and dying to the last warrior alongside the Legio Custodes, never giving ground during the insurrectionist surprise attack on that world's ceremonial plaza. By their sacrifice was the wounded Emperor, who had suffered injury through the use of a Vortex weapon by the enemy, bought time to recover and fight his way clear of the Proximan insurrectionists' trap. In recognition of this sacrifice, the standard of the Palatine Aquila so fiercely fought for that day was given to the Legionaries of the III Legion by the Emperor's own hand, to be their relic ever after, along with the right to end the Proximan revolt by Exterminatus and so repay the blood that was owed them.
ca. 830.M30 Gene-Seed Crisis III Legion Luna & Terra Coming within a solar year of their great moment of triumph fighting at the Emperor's side at Proxima, the III Legion suffers the catastrophic loss of nearly their entire gene-seed stock. This would prove a turning point that was to forever alter the Legion's future. When the III Legion's gene-seed reserve was dispatched to Luna for establishment there, it is not quite clear what exactly happened next. Some claim that elements of the Selenite gene-cults still resistant to the Imperium hijacked a defence laser and destroyed the ship carrying the gene-seed, while conflicting accounts recount that

the ship lost control and crashed as it was attempting to dock, whilst others claim that it simply vanished. The loss of the III Legion's gene-seed reserve was a severe blow, but it would not have endangered the Legion's survival if a second calamity had not occurred in quick succession. It was soon discovered that a fast acting viral blight had suddenly infected several of the gene-seed vaults on Terra, its cause and origin unknown. Feverishly the Bio-Magos sought to hold it in check as its progress threatened to wipe out in a matter of hours what had taken a century to build, but the doubtlessly artificial-and many surmised xenos-infection defied treatment, and it was only the intervention of the Emperor's own peerless genius that was to purge the taint. While many Legions suffered losses from this attack from an unknown quarter, the blight was found to have destroyed the gene-seed of the III Legion in its entirety.

ca. 830.M30 The "Ghost Legion" "Ghost Legion" Segmentum Solar Anomalous Legiones Astartes activity is first reported. There are only a few sparse but suggestive fragments -- anomalous records of unknown Legiones Astartes units carrying out targeted strikes, abductions and assassinations, both on Terra and beyond, and reports of Space Marine units answering to no known masters or Legion allegiance passing through war zones on high priority missions and under the writ of unassailable clearance codes which broached no question. These mysterious elements are attributed to the mysterious 'Ghost Legion'.
ca. 832.M30 Discovery of the Primarch Fulgrim Emperor of Mankind's Principia Imperialis Fleet Chemos The Emperor comes to the industrial Mining World of Chemos and reunites with his lost son Fulgrim, who upon first meeting, recognises the Emperor for who He is, and bends his knee and offers his sword in eternal servitude. Pleased, the Emperor brings Fulgrim into the Imperial fold, and not long after, gives him command of the III Legion.
ca. 830s.M30 Praxil Rebellion Emperor's Children, Blood Angels, Imperial Fists, Imperialis Auxilia & Mechanicum assets vs. Rebellious population of the Praxil System Praxil System When the worlds of the Praxil System were first discovered, the Imperium was pleased by the prospect of adding them to the Imperium. Though bringing Praxil into Imperial Compliance would bring the Imperium great renown, this formidable civilisation refused to bend the knee to the light of the Imperial Truth, and instead were prepared to fight to maintain their independence. Their warfleet was formidable, and managed to push back the initial invasion of the Imperial Expeditionary Fleet. The Imperium wanted Praxil's wealth and resources to harness to the needs of the Great Crusade, and so the securing of Praxil fell to an Army Group-sized force of the Emperor's Children, supported by selected elements of the Imperial Army and the forces of the Mechanicum. But the initial campaign did not go well, as the Imperial forces sustained severe casualties and faced opposition at every turn, despite changing their tactics. Too prideful to ask for help, the War Council of Terra sent a force of Blood Angels and Imperial Fists to assist. the beleaguered Imperial forces. Despite his misgivings and slight to his personal honour, the Lord Commander accepted his cousin Legions' assistance and immediately drew up plans for prosecuting the second offensive against the Praxil. With their combined strength, the Imperial forces launched a successful second offensive against the Praxil that soon saw an Imperial victory.
ca. 800s.M30 Defence of Tranquility Luna Wolves, Emperor's Children,

Imperialis Auxilia & Mechanicum assets

Dalinite Nebula The Defence of Tranquility was a protracted and vicious engagement fought by the Emperor's Children on the periphery of the Dalinite Nebula region during the early phase of the Great Crusade's progress into the Galactic East. Of particular interest to the Imperium was the discovery of the Dalinite Gates, which were part of the mysterious series of Warp Gates scattered across the stars, and could greatly increasing the ability of the Imperium's fleets to reach new targets and expand the reach of the Emperor's forces. A Cohort barely numbering 500 warriors of the Emperor's Children were given the important role of securing the world of Tranquility on the trailing edge of the Imperial advance. The world was utterly worthless except that a Warp Gate, designated the Tranquility Gate, hung in high orbit above the planet's pole and a forward Imperial navigation and signal relay had been constructed there. Without warning, a larger xenos fleet exited the warp gate, which proceeded to mount a ground assault on the planet's surface. The Imperial warships executed a rapid, desperate counterattack, which caused the xenos fleet to flee back through the warp gate, and leaving their ground forces to be annihilated by the vengeful Emperor's Children.
ca. 800s.M30 Extinction of the Katara Emperor's Children Imperialis Auxilia & Mechanicum assets vs. Katara xenos Katara homeworld The xenocide of the alien Katara was a brutal campaign of extermination carried out against this insular Abhuman civilisation that had evolved in the Kenuit System. Initially offering no resistance, matters only deteriorated when the Katara were asked directly to formally surrender to the Imperium. Soon a lone Kataran warship arrived and destroyed the Light Cruiser Locrian before sustaining damage itself and withdrawing. So provoked, acting Lieutenant Commander Abdemon ordered the invasion of the largest Kataran city-complex. The Katara's diplomatic representatives came forward again, requesting to meet in a truce. He made the proposal that the conflict should be decided by a lone champion from each faction. Lieutenant Commander Abdemon agreed and said that he would enter the field as the Imperium's champion. Both combatants fought a brilliant, long drawn out and bloody duel. Imperial champion got under the alien's guard and delivered the killing blow. With their champion defeated, the Kataran representatives ordered that all should know that their people had been defeated by an enemy of equal honour but superior arts. The order given, the Kataran leaders fell on their own swords before the Emperor's Children. Across all their domains every member of the Katara followed their leaders in death and the Kataran cities became massive tombs. Showing respect for their fallen foes, the Emperor's Children departed the Kenuit System, leaving the worlds of Katara as Mortuary Worlds.
ca. 800s.M30 Castigation of Terentius Luna Wolves, Night Lords, Iron Hands, XX Legion vs. the traitorous forces of the Ordani Cluster Ordoni Cluster When the forces of the Great Crusade first entered the Ordoni Cluster, they encountered the formidable warlord Vatale Gerron Terentius. Observing the forces arrayed against him, Terentius was forced to take the path of survival and surrendered to the Imperium. For the next five decades he rose in power and reputation, conquering worlds around the Halo Stars in the name of the Emperor. At the height of his powers, he had the ear of Malcador the Sigillite and the countenance of several Primarchs. When he finally turned against the Imperium, many were shocked. He began a contra-Crusade to conquer already-Compliant worlds to add to his pocket empire. The Imperium responded by sending Horus and his Luna Wolves Legion to not only break the Renegade but to demonstrate to any others who harboured similar ideas within the Imperial forces the inevitability of a betrayer's defeat. Large support from the Night Lords, Iron Hands and the Alpha Legion, joined the might of the Luna Wolves. Soon the rebel forces were fragmented, driven by tales of culled worlds. At the height of the campaign, Horus himself, with a cadre of 50 elite Justaerin Terminators, teleported aboard the bridge of Terentius' flagship, where the Commander slew the unrepentant traitor with his Talon. Soon the rebel forces were fragmented, driven by tales of culled worlds. The Night Lords decimated every world within Terentius' rebel empire. The power of the Iron Hands and elements of the Ordo Reductor were brought to bear on every structure on Terentius' bastion worlds. Soon the rebels of his realm were slaughtered, their cities smashed to dust, and his homeworld's very air laced with toxins. Once the castigation was complete, Horus sent the gold-dipped skull of Terentius to Terra with the ironic warning carried on the lips of the messenger who bore it, 'So perish all traitors'.
ca. Early-830s.M30 Discovery of the Primarch Vulkan Emperor of Mankind's Principia Imperialis Fleet Nocturne The Emperor arrives upon the volcanic world of Nocturne. He reunites with his lost son Vulkan, who only agrees to serve the Emperor after competing in a difficult challenge to slay the largest salamander -- a large drake-like creature native to Nocturne. During the contest, Vulkan's life ended up in jeopardy, and though the Emperor had obtained a larger prize, he sacrificed his trophy in order to save his son's life. Humbled by the stranger's deed of self-sacrifice, Vulkan bent his knee to the Master of Mankind. It is believed he served with the Emperor for some time before he finally took command of the XVIII Legion.
833.M30 Osiris Rebellion XIII Legion's 12th Expeditionary Fleet, Imperialis Auxilia & Mechanicum assets vs. Rebellious Osiris System population Osiris System For unknown reasons, the eleven star systems of the Osiris Cluster declare independence from the Imperium. The XIII Legion sends their 12th Expeditionary Fleet to put down the rebellion. But failures in intelligence turn what was intended to be a swift victory into a battle for attrition against a previously unknown xenos threat -- Osiran Psybrid xenoforms. The vile aliens drive the human population to attack the Legiones Astartes in droves. Ordering his force to withdraw after sustaining heavy losses, Legion Commander Gren Vosotho, along with the XIII Legion flagship Sethaln's Thunder is lost. Command falls to First Captain Marius Gage. The Osiris Cluster is then blockaded. The 12th Expeditionary Fleet returns a year later with a force heavily augmented from the Solar Armada, elements of the XVIII Legion and specialist anti-psyker cadres from Terra, they found worlds either left as wastelands of unburied dead or locked in turmoil and civil strife.
ca. Late 830s.M30 Discovery of Primarch Rogal Dorn Emperor of Mankind's Principia Imperialis Fleet Inwit The Emperor's fleet comes to the icy world of Inwit and reunites with his lost son Rogal Dorn, the seventh missing Primarch to be found. He quickly instructs Dorn in the ways of the Imperium and their objectives with the Great Crusade, and soon passes off command of the VII Legion, whom Dorn remakes into the Imperial Fists.
ca. 838.M30 Discovery of Primarch Roboute Guilliman Emperor of Mankind's Principia Imperialis Fleet Macragge The Emperor comes to the 'Five-Hundred Worlds' and its capital, Macragge, to reunite with his lost son Roboute Guilliman. Impressed with his son's superlative organisational skills and strategic planning, he quickly passes on command of the XIII Legion to Guilliman, who reforges them into his own, as the newly renamed Ultramarines.
ca. Early-840s.M30 Discovery of Primarch Magnus the Red Emperor of Mankind's Primaris Imeprialis Fleet Prospero The Emperor comes to the planet of Prospero and reunites with his psychically gifted son Magnus the Red. Shortly thereafter, Magnus assumes command of the XV Legion and renames them the Thousand Sons.
842-843.M30 Liberation of Incaladion IV Legion, Imperialis Auxilia & Mechanicum assets vs. Legio Fureans and Incaladion Mechanicum forces Incaladion During the liberation of the war-torn Forge World of Incaladion, the IV displayed their reliance on rationaility and intellect set against infrequent but telling episodes of bloody-minded stubbornness in the face of overwhelming odds. In a gruelling year long campaign, victory was at last achieved, but the war saw the near annihilation of the IV Legion's 8th Expeditionary Fleet's frontline forces in what was arguably a needlessly costly fashion.
843.M30 Discovery of Xana II Expeditionary Fleet of Rogue Trader Casilida DeAniasie Xana II When a damaged galleass belonging to the Rogue Trader Casilida DeAniasie, having been flung far off-course after engaging in battle with Fra'al Corsairs, intercepted a trio of hulking automata warships at the edge of the intergalactic void. Although they might have taken or destroyed her already damaged ship with little effort, these vessels instead offered aid and carried with them a message of greeting and an offer of diplomatic exchange between the 'Sovereign Forge Domain of Xana' and the Imperium of Man and its Emperor.
ca. 840s.M30 Discovery of Primarch Sanguinius Emperor of Mankind's Principia Imperialis Fleet Baal The Emperor arrives upon the irradiated world of Baal, and is reunited with his angelic son, Sanguinius. Not long after their reunion, Sanguinius is given command of the IX Legion and remakes them in his own image, renaming them the Blood Angels.
ca. 840s.M30 Discovery of Primarch Lion El'Jonson Emperor of Mankind's Principia Imperialis Fleet Caliban The Emperor of Mankind comes to the Death World of Caliban and reunites with his lost son, Lion El'Jonson. A young, newly-inducted Calibanite I Legion Librarian, Zahariel El'Zurias narrowly averts an attempted assassination on the Emperor's life. After being given command of the I Legion, the Lion reforges it into his own image, and dubs them the Dark Angels, named after an allegorical figure of Calibanite myth.
ca. Late-840s.M30 Discovery of Primarch Perturabo Emperor of Mankind's Principia Imperialis Fleet Olympia The Emperor comes to Olympia and reunites with his lost son Perturabo. Upon being command of the IV Legion after a very short period of adjustment, Perturabo reviews his Legion's battle records and finds them lacking. Therefore he orders his entire Legion to be punished through 'decimation'. Drawing lots, one in nine Legionaries are killed by their remaining battle-brothers with their bare hands. Following this action, Perturabo leads his Legion to the Meratara Cluster and forges them into a Legion in his own image. The IV Legion formally becomes the Iron Warriors.
Late 840s.M30 The Fall of the Black Judges Iron Warriors vs. Black Judges "Rock of Judgement" (Hollowed Moon) This was the Iron Warriors' first Imperial Compliance campaign under the direct command of their Primarch, which was conducted against the barren, ravine-hollowed moon known as the "Rock of Judgement" and its masters, the heretical Black Judges. These self-appointed arbiters of human purity, life and death, were twisted and withered creatures that had once been human in ages past. The IV Legion, reeling from its enforced Decimation as punishment at its new master's hands, was shamed into a desperate desire to prove itself to its Primarch, and it was the Black Judges that were to suffer its pent-up hatred and wrath. By Perturabo's design the enemy was crushed without mercy and their domains were stripped of every valuable resource and technology; wreckage and weapons flowed to Olympia and the Black Judges' long guarded secrets fell also to the newly renamed Iron Warriors and their master, as well as to the Mechanicum in return for their aid. With the world stripped of its resources, the orbital shipyards of the Rock of Judgement were finally set in orbit afresh around Olympia and set to work fashioning a new generation of warships under Perturabo's seal.
ca. 850s.M30 Pacification of Schravaan Emperor's Children, Iron Warriors, Imperial Fists, & Luna Wolves Legions vs. Badoon xenos Schravaan This was a joint Imperial Compliance action conducted by four Legions of Space Marines against the vile xenos Badoon. Upon their home world of Schravaan, the Iron Warriors won a great victory when they stormed the final refuge of the Badoon. They breached the defences and held while the other Legions carried the city beyond. During the following victory feast, Horus proclaimed Perturabo the greatest master of siege warfare in the Great Crusade. Fulgrim then inquired to his brother Rogal Dorn whether he thought even the defences of the Imperial Palace could resist the Iron Warriors, in which Dorn replied that he regarded the defences as being proof against any assault if well-planned. Perturabo flew into a rage and unleashed unfounded accusations against his brother. After this the two rarely spoke, and neither of their Legions served in the same campaign for the remainder of the Great Crusade.
ca. Mid-800s.M30 Discovery of Primarch Mortarion Emperor of Mankind's Principia Imperialis Fleet Barbarus The Emperor comes to the toxic Death World of Barbarus and reunites with his lost son Mortarion. Upon meeting the Emperor for the first time, Mortarion was oblivious to any obvious connection or physical resemblance. Angry, Mortarion declared that he and his Death Guard needed no help to finish their quest for justice. The Emperor quietly challenged the stormy young Primarch's assertion, pointing out his soldiers' failure to reach the last high citadel, and then threw down a gauntlet. If Mortarion could defeat the high overlord alone, he would withdraw and leave Barbarus to its own means. But if he failed, they would join his Imperium of Man and Mortarion would swear total fealty and allegiance to him. Mortarion was true to his oath. When he recovered, he bent his knee to the stranger and swore himself and the Death Guard to his service. Only then did the Emperor of Man reveal himself as the young Primarch's true father, and the destiny such service would bring: command of the XIV Legion. Shortly thereafter, he give his son command of the Dusk Raiders, and remakes them in his own image, renaming them the Death Guard.
ca. Mid-800s.M30 Conquest of Galaspar Death Guard, Imperialis Auxilia & Mechanicum assets Galaspar This was the first major independent campaign conducted by the newly-dubbed Death Guard after Mortarion took charge of the XIV Legion. The conquest of the non-Compliant Hive World of Galaspar remains one of the most remarkable and brutal victories of the Great Crusade's course through the near reaches of the Segmentum Pacificus. When the Imperial support fleet arrive they were horrified by the aftermath of the slaughter. The billions of humans "liberated" by the Death Guard were almost childishly eager to accept the Emperor's servants and adopt their ways. In the wake of the conquest Galaspar, the cluster of worlds quickly capitulated with terrified speed, all willing to submit to Imperial Compliance under any terms as long as they were spared the reaper's scythe.
ca. 800s.M30 Kajor Compliance Death Guard, Imperialis Auxilia & Mechanicum assets Kajor On the world of Kajor the Death Guard Legion encountered a warrior race of humans that had fallen to barbarism. Extensive orbital surveys detected no trace of advanced technology, yet it took the XIV Legion nearly six months to bring Kajor to submission. Though the Kajori were savages, armed with little more than blades and crude flintlock carbines, this feral race was able to hold the Death Guard at bay. They were able to do so because they possessed fell powers and unseen allies. In quieter moments, Mortarion still thought of the Kajor campaign and shuddered. Mortarion would later recount the tale of this campaign during the Council of Nikaea as one example of many why he took a personal stance against sorcery and the use of psychic abilities.
Mid 800s.M30 Destruction of WAAAGH! Mashogg Iron Warriors, Space Wolves, & White Scars, Imperialis Auxilia & Mechanicum assets vs. Orks Unknown System In one famous instance, a joint Imperial Compliance campaign was conducted by the Iron Warriors, Space Wolves and White Scars Legions against the the vast Greenskin horde known as WAAAGH! Mashogg. Legends record that it was the Primarchs Leman Russ and Jaghatai Khan who routed the Orks of Overdog Mashogg's WAAAGH!, while Perturabo was featured only as the "comrade" who calculated the optimum way to bypass Mashogg's low orbit defences.
Mid 800s.M30 Compliance of the Araaki Spiral Iron Warriors, Dark Angels, Imperial Fists & White Scars, Imperialis Auxilia & Mechanicum assets Araaki Spiral A joint Imperial Compliance campaign conducted by the Iron Warriors, Imperial Fists, Dark Angels and White Scars Legions in a region of space known as the Araaki Spiral. The Araakites were well-versed in the art of building fortresses, and their strongholds were dug deep around narrow passes, remote hilltops and natural barriers in the landscape. Once again, the Iron Warriors were sent to a resistant star system to conduct brutal siege-warfare against formidable fortress-builders. The Araakites knew their craft well and the campaign to take their world for the Imperium proved both bitter and hostile. It would take many years for the IV Legion to regain its former strength from the losses sustained during the drawn-out war of attrition that its Astartes suffered in the Araaki Spiral. In the wake of the inevitable Imperial victory, great works of art and heroic verse were composed, celebrating the courage of the other Space Marine Legions, but nowhere in the reams of poetry and artwork were the grim labours of the Iron Warriors judged worthy of note. Only in a predella to a larger work painted by a notable Imperial artisan were the warriors of the IV Legion displayed; it illustrated a lone Iron Warriors Apothecary removing the gene-seed of a dying Legionary as the flag of the IV Legion's greatest rivals, the Imperial Fists, flew over a captured fortress. Perturabo sought out the artist to procure the piece for himself, only to have it put it to the torch once he had done so. If his sons would not be honoured properly, he told the horrified artist, then they would not be a part of a record that glorified another. Afterwards, Rogal Dorn had offered a rich commission for the artist to repaint the predella, but the artisan wisely refused.
ca. Mid-800s.M30 The Two Wars of Araneus Imperial Fists contingent, Imperialis Auxilia & Mechanicum assets Araneus Prime The worlds of the Araneus Continuity were a series of planets close to the Sol System which had maintained links to one another due to the existence of a series of ancient Warp Gates of unknown origins. Ruled by a caste of Technobility from the world of Araneus Prime at the heart of the network of Warp Gates. After an Imperial squadron accidentally jumped through one of their gates, they were boarded and overwhelmed by cybernetically-grafted warriors. An envoy fleet was sent, and was allowed to return bearing the Continuity's answer to the Emperor's demand of fealty. The Technobility flatly refused to bow to the Emperor, but instead invited Him to join their empire as a tributary. For its response, the Imperium turned to the Imperial Fists. It fell to Hashin Yonnad, Commander of the 39th Household (Chapter) of Inwit, to prosecute the war. A full-scale assault was launched, and within two months their empire was cut from around them, and finally reduced to just Araneus Prime. But at the moment the Imperium was to claim victory, an unknown menace emerged from one of their Warp Gates, and soon six star systems of the Continuity burned. Overwhelmed by the vastly larger enemy force, Yonnad made the hard decision to destroy the Warp Gates, sparing the final system, but costing thousands of Imperial Fists' and billions of humans' lives, Araneus Prime survived, but barely. Now a smoking cinder, the charred remains of the devastated world, the Imperium gave the planet a new name -- Necromunda.
ca. Mid 800s.M30 Compliance of 82-17 (Nova Shendak) War Hounds, Iron Warriors & Imperialis Auxilia assets Nova Shendak Early in the Great Crusade, the War Hounds Legion had found three star systems under the thrall of giant xenos creatures who were both intelligent as well as hateful. Their weapons were filaments, metal feathers that they embedded in themselves to conduct potent bioelectrical energies out of their bodies. The War Hounds proceeded to burn them out of their colony nests and chase them back towards their homeworld. But on their cradle-world of Nove Shendak the XII Legion had, to their immense surprise, discovered humans. The War Hounds, alongside their fellow Legiones Astartes, the Iron Warriors, and a large contingent of Imperial Army soldiers were charged with exterminating the worms and liberating the humans of Nove Shendak. When the worms finally emerged from the earth to assault their attackers, they met the Emperor and His War Hounds. Though the casualties were horrendous, the War Hounds eventually emerged triumphant and the worms of Nove Shendak found only extinction. The people of that world inherited the planet and became fervent supporters of the Imperium.
Late 850s.M30 Discovery of Primarch Lorgar Aurelian Emperor of Mankind's Principia Imperialis Fleet Colchis The Emperor comes to the world of Colchis to reunite with his lost son Lorgar Aurelian. Lorgar believes that his father, the Emperor, is a being worthy of devotion and begins to fervently preach the divinity of the God-Emperor. He reshapes the XVII Legion in his image, and renames them the Word Bearers.
ca. Late-850s.M30 Discovery of Primarch Jaghatai Khan Emperor of Mankind's Principia Imperialis Fleet Chogoris The Emperor of Mankind comes to the feral world of Chogoris and reunites with his lost son Jaghatai Khan. Shortly thereafter, he is given command of the V Legion and remakes them into the White Scars.
ca. 857.M30 Discovery of Primarch Konrad Curze Emperor of Mankind's Principia Imperialis Fleet, Thousand Sons, Imperial Fists and Emperor's Children & Ultramarines contingent Nostramo The Emperor of Mankind, alongside several of his Primarch sons, including, Magnus the Red, Rogal Dorn and Fulgrim, as well as representatives from the Ultramarines Legion, come to the perpetually dark world of Nostramo and reunite with Konrad Curze. Shortly thereafter, Curze takes control of the VIII Legion, and molds them into the fearsome Night Lords.
865.M30 Battle of Rennimar Imperial Fists, Death Guard & Space Wolves, Imperialis Auxilia & Mechanicum assets vs. Orks Rennimar This was a massive Imperial Compliance conducted by the Imperial Fists Legion against the massive Ork WAAAGH! of Over-Tyrant of Grel in the Rennimar System, who was himself, was already under siege by both the Death Guard and Space Wolves Legions. Rogal Dorn, alongside Captain Archamus, the commander of his Huscarl Honour Guard, lead a force of 10,000 Imperial Fists against the greenskin forces. Typical of the VI Legion, they established heavy-walled bulwarks on the planet Rennimar, which enticed the Orks to hurl themselves and futilely smash against the Imperial Fists' stalwart defences. This enabled the Legiones Astartes to utterly crush their xenos foes.
869.M30 Compliance of Molech Emperor of Mankind's Principia Imperialis Fleet, Luna Wolves, Dark Angels, Emperor's Children, White Scars, Imperialis Auxilia & Mechanicum assets vs. People of Molech Molech The newly discovered Knight World of Molech is brought into compliance through a massive joint-compliance operation between multiple Legiones Astartes. Cyprian Devine of House Devine is named Planetary Governor of Molech. In the presence of several of his Primarch sons, the Emperor leads them to a Warp portal, where He proceeds to enter into the Realm of Chaos to parley with the Ruinous Powers. When He returns, the Emperor appears aged, but much more powerful. He then suppresses his sons' memories of Molech and stations a large garrison force comprised of nearly 100 Imperialis Auxilia regiments, three Legio Titanicus cohorts, and detachments from two Space Marine Legions to protect the secrets of the Warp portal on Molech.
Mid-800s-890.M30 Rangdan Xenocides Dark Angels, Imperialis Auxilia, Xanthite Mechanicum assets & Titans from the Legio Gryphonicus, Legio Kydianos, & Legio Vulturum vs. Rangdan xenos Halo Stars The Titans of the Legio Gryphonicus as well as the Legio Vulturum, the Legio Kydianos and other Xanithe Mechanicum forces of Xana II, served alongside the vaunted Dark Angels Legion during the vital campaign known as the Rangdan Xenocides. The Dark Angels hurled themselves at the enemies and broke their greater strength in countless battles against the vile xenos on the edge of the Halo Stars. This campaign culminated in the Third Rangdan Xenocide around 890.M30, which resulted in the loss of the lives of 50,000 Space Marines spent in preventing the destruction of perhaps the entire northern Imperium by the menace from the outer darkness. Due to these extensive losses suffered by the Ist Legion, by 899.M30, the Ultramarines Legion were on the cusp of becoming the largest Space Marine Legion, standing at around 166,000 Legionaries.
876.M30 Compliance of Zavarich 611th Expeditionary Fleet, Imperialis Auxilia & Mechanicum assets vs. people of Zavarich Zavarich The Feudal World of Zavarich, located within the Cyclops Cluster region, is brought bloodlessly into Imperial Compliance by the 611th Expeditionary Fleet. Shortly thereafter, Zavarich enters into operation as a fully managed Agri-World by the time of the Heresy, and is notable for being one of a relative handful of such worlds in the region.
891.M30 Crisis of the Hungering Gyre Gryphonne IV Mechanicum & Titans of the Legio Gryphonicus Unknown The Mechanicum forces of Gryphonne IV, along with their resident Legio Titanicus forces from the Legio Gryphonicus fought a hence unknown xenos menace known as the Hungering Gyre, and arose victorious amid great personal sacrifice. In recognition for their great service and sacrifices during this campaign, the Emperor decreed that Paramar V and its industrial facilities would be granted as a vassal domain to the distant Forge World.
Late 800s.M30 Discovery of Lascal Dark Angels 7th Expeditionary Fleet vs. Orks Lascal This terrestrial world was discovered on the edge of the Grail Abyss by the 7th Expeditionary Fleet under Lord Commander Suleiman Grimm of the I Legion. Originally it had been a feral Ork holding before the Dark Angels exterminated the Ork infestation. Lascal became a forward outpost of the Great Crusade, and later a naval fleet anchorage was constructed there in orbit under the auspices of the Lucien Mechanicum. Continuing to grow, by 902.M30, Lascal had become an independent and self-sustaining Imperial colony.
891.M30 Discovery of Grail Imperial Expeditionary Fleet of Rogue Trader Van der Veld Grail The Expeditionary Fleet of Rogue Trader Corthona Van der Veld discover an errant Dead World and names it Grail. This world's namesake is later given to the region known as the Grail Abyss, a place of hidden wealth and terrible danger which has long drawn Explorators and would-be treasure hunters to their graves.
899.M30 Xenocide of the Osiran Psybrids War Hounds & Ultramarines Legions vs. Osiran Psybrids xenoforms Eurydice Terminal A sub-fleet of the XII Legion, under the command of Praetor Erad Krüg, was fighting on the south-western extreme of the Great Crusade's frontier near the Eurydice Terminal, against Ork raiders of the self-styled Glortian Empire from the untracked abysses beyond. As both sides fought one another, they were suddenly best upon by a mysterious third party -- the deadly xenoforms known as the Osiran Psybrids. As nightmarishly power xenos teleported aboard the War Hounds' vessels, only their savage tenacity allowed them to survive, as they lost dozens of their own ships and hundreds of Ork vessels were shattered. Primarch Guilliman ordered the War Hounds to hold at all cost, and if possible, to track the Psybrids' vessels to their source. The Ultramarines despatched a powerful Retribution fleet to the Eurydice Terminal, and soon joined their fellow Legion. With their combined might, the Ultramarines systematically wiped out the Psybrids, and when they died, so too did their slave armies. They soon made short work of the remaining Glortian Orks as well, driving them into the outer darkness. The blood price of the battle had been high, but it was a price the Ultramarines were willing to pay for the defeat they suffered nearly six decades earlier.

900s.M30Edit

Date
Event
Participating Force(s)
Location
Notes
ca. 900.M30 Establishment of the Temple of the Saviour Emperor Self-proclaimed prophet, 'Fatidicus' Terra A highly decorated Imperial Army officer takes the name "Fatidicus," meaning 'prophet', and secretly establishes the Temple of the Saviour Emperor on Terra in violation of the atheistic doctrines of the Imperial Truth. Via the Imperial Army, his teachings will eventually spread across the entire newborn Imperium of Man.
ca. 900s.M30 Assault on Dulan Dark Angels & Space Wolves Legions vs. Dulani rebels Dulan As the Space Marine Legions pushed back the frontiers of the Imperium, each Primarch strove to excel in the eyes of the Emperor and none more so than Leman Russ, Primarch of the Space Wolves. Only Horus and Lion El'Jonson could claim more victories than Russ and this was a constant frustration for him. It was on the world of Dulan where the Space Wolves were fighting alongside the Dark Angels that matters came to a head. The Tyrant of Duran had personally insulted the Emperor, sacrificing thousands of Imperial priests to his patron Daemon, and both Russ and Jonson desired the honour of slaying this heretic. The Tyrant Durath insulted Russ, causing him to demand the right to lead the attack on the fortress. Johnson ignored him and led his own carefully planned attack instead, killing the Tyrant personally. After the battle Russ confronted and attacked Johnson, and the two dueled for a day and a night. Russ eventually stopped attacking, seeing the humor of the situation, at which point Johnson knocked him unconscious. Now he considered honour to be satisfied. The prostrate Russ was carried from the fortress by his men and, when he regained consciousness, the Dark Angels had already departed to fight in the Alisore campaign. Russ swore he would avenge the stain on his honour and, to this day, whenever the Space Wolves and Dark Angels meet, one of their number is called upon to refight the duel of the Primarchs in order that honour may be satisfied.
ca. 900s.M30 Compliance of Tarsis Ultramarines, Imperialis Auxilia & Mechanicum assets vs. Non-compliant Tharsis Tharsis This was an Imperial Compliance carried out by the Ultramarines Legion upon the world of Tarsis against unknown assailants. During the assault the Primarch Roboute Guilliman was attacked by a mysterious assailant, but was saved by a a native soldier of this world. In a supreme display of humility, Guilliman bent his knee before the soldier and vowed a warriors oath that should this world ever need aid then the Ultramarines would answer the call. A temple within the capital city of Erebus displayed the Tarsis Frescoe, a mosaic of enormous proportions painted by an unknown artist that covered the walls, ceiling and even the floor, covering the entire chamber like a canvas. This frescoe displayed the events that had occurred during the Great Crusade. In gratitude to Guilliman and the Ultramarines, the planet renamed itself Tarsis Ultra in honour of its saviours.
ca. 900s.M30 Shi'Hu'Gal Purge Night Lords, Demi-Legios of Legio Vulcanum I & Legio Vulcanum II, Imperialis Auxilia & Mechanicum assets Unknown Sector The Night Lords, supported by the Titan Legions Legio Vulcanum I ('Dark Fire') and Legio Vulcanum II, carried out the infamous xenocidal purge of the Shi'Hu'Gal Dominion during the Great Crusade; this was a campaign of such fury and viciousness it remains a legend of this bygone era, even after the far greater death and destruction caused by Horus' betrayal of the Emperor.
ca. 900s.M30 Compliance of Tethonus Luna Wolves, Imperialis Auxilia & Mechanicum assets Tethonus The Luna Wolves Legion fought against an unidentified xenos-adversary whose identity is not recorded in existing Imperial records while bringing the world of Tethonus into Imperial Compliance. This Compliance action was a long siege of the xenos fortress-states on Tethonus. Horus had tasked the masters of the Forge World of Diamat to create continental Ordinatii siege machines; vast artillery pieces that could devastate the most powerful fortifications. But the war machines took much longer for the forge masters to complete than planned. By the time they were finished, the campaign on Tethonus had been over for over a standard year and a half, and Horus had moved on to other conquests. So the weapons were put into a depot on Diamat against the day when he would come to claim them. Fifty standard years later, Horus would reveal his perfidy at Istvaan III, and would send raiding forces to claim these siege engines for later use in his attempt to overthrow the Emperor of Mankind.
ca. 900s.M30 Assault on Dahinta Luna Wolves, Imperialis Auxilia & Mechanicum assets vs. Overseers Dahinta On the world of Dahinta, the Luna Wolves Legion fought against a race of self-aware machines called the Overseers, who were led by the artificial intelligence known as the Archdroid. One of the Emperor's longest-standing commands was that no sentient machines could be allowed to exist, for they had nearly caused the extinction of Mankind when they had rebelled against their human overseers during the Dark Age of Technology. Despite heavy casualties amongst, the thinking machines were wiped from the face of Dahinta by the savagery of the Astartes. Only after the campaign had ended was the full truth learned: the Overseers had been created by a vanished offshoot of humanity that had settled Dahinta, perhaps during the Age of Technology. The Overseers had cared for their lost masters' crumbling cities long after they had become extinct or left their homeworld behind.
ca. 900s.M30 Compliance of Five-Twenty-Nine Alpha Legion, Imperialis Auxilia & Mechanicum assets Five-Twenty-Nine This was an Imperial Compliance action carried out by the Alpha Legion against an adversary of unknown origin upon the world designated Five-Twenty-Nine.
ca. 900s.M30 Compliance of Fernius Worlds Alpha Legion, Imperialis Auxilia & Mechanicum assets Fernius Worlds This was an Imperial Compliance action carried out jointly by the Alpha Legion and an Imperial Army sentry force comprised of the Geno Seven-Sixty Spartocid. The Seven-Sixty were a well-drilled regiment and did not spook easily. They played an instrumental role during the Compliance of the Ferinus Worlds.
ca. 900s.M30 Compliance of Thorium Abominiplex Alpha Legion & Death Guard Legions, Imperialis Auxilia & Mechanicum assets Thorium Abominiplex This was an Imperial Compliance action that was carried out jointly by both the Alpha Legion and Death Guard Legions against an unrecorded adversary.
ca. 900s.M30 Xenocide of Kamenka Troika Thousand Sons, Imperialis Auxilia Mechanicum assets & Cohorts of the Legio Astorum Kamenka Ulizarna This was a campaign of extermination waged in the middle years of the Great Crusade against the barbaric Orks of the Kamenka Troika system. The Emperor had issued the writs of war, commanding the Thousand Sons, the Legio Astorum Titan Legion and a Lifehost of PanPac Eugenians of the Imperial Army to drive that savage race of xenos from the three satellite planets of Kamenka Ulizarna, a world claimed by the Mechanicum of Mars. The savagery of that war, the slaughter and relentless, grinding attrition had left tens of thousands of dead in its wake. The Imperial forces proved victorious after two standard years of fighting and earned a score of honours for their war banners. Victory had been won, but the cost had been high. The Thousand Sons sustained severe losses of 873 Battle-Brothers of the 5th Fellowship, effectively wiping the 5th out as a functioning unit. This forced Magnus the Red to reduce his Legion from ten Fellowships to the Pesedjet, the nine classic Fellowships of Prosperine antiquity.
902.M30 Subjugation of Kaldorax Aleph Iron Warriors contingent, Imperialis Auxilia & Mechanicum assets vs. Non-compliant forces Kaldorax Aleph The Iron Warriors 118th & 3rd Grand Battalions undertake the forced subjugation of Kaldorax Aleph, but sustain a high blood price to achieve victory, suffering nearly 65% casualties. Though the Iron Warriors absolutely crush the non-Compliant forces of the intransigent world.
903.M30 Compliance of 47-10 (Khur) Word Bearers, Imperialis Auxilia & Mechanicum assets vs. Non-compliant population of Khur Khur The Word Bearers successfully bring Khur into Imperial Compliance approximately a Terran century before the events of Istvaan III at the outset of the Horus Heresy. The beautiful capital city of Khur, known as Monarchia, called the 'Perfect City' by the Word Bearers, was built by the people of Khur at the direction and exhortation of the Word Bearers to demonstrate their faith and devotion to the God-Emperor.
Early 900s.M30 Discovery of Primarch Angron Emperor of Mankind's Principia Imperialis Fleet Nuceria The Emperor arrives to the world of Nuceria, where he observes his long lost son, Angron Thal'kyr, lead a revolt of slave-gladiators against their cruel overlords. Angron had been found as a young adolescent and sold into slavery. He then underwent horrific surgery, where barbaric cranial implants were hammered into his brain. Thrown into the fighting pits for his masters' pleasure, he soon rose to the top, and became the Lord of the Red Sands. On the eve of the largest exhibition, Angron led a successful revolt and breakout of many of his fellow slave-gladiators. Taking refuge within the De'shea Mountains, on the eve of their final confrontation with their cruel overlords, Angron dug his own grave, ready to die alongside his brothers and sisters in the name of freedom. But before the battle took place, the Emperor intervened and teleported Angron aboard his own flagship. Angron's fellow gladiators were slain to a man. Angron was then examined and given over to his genetic sons from the XII Legion. After assuming command, he reshaped his Legion into his own image, and they became the World Eaters.
Early 900s.M30 Golgothan Slaughter, Siege of Sarum World Eaters, 13th Expeditionary Fleet, Titans of the Legio Audax, Imperialis Auxilia & Mechanicum assets vs. Brotherhood of Ruin Sarum The first known target to suffer the wrath of the World Eaters Legion after their Primarch Angron took command, was the stellar wasteland of the Golgotha Sector, located near the galactic core in the Segmentum Ultima, close to the realspace Warp rift known simply as the Maelstrom. Here, the World Eaters came upon the Sarum Sector, and the Forge World of Sarum, which was being besieged by the Abhuman empire known as the Brotherhood of Ruin who wished to take the Mechanicum's technological secrets for themselves. The World Eaters immediately launched a brutal assault upon the abhuman army and brutally slaughtered them. the Redjak Cult Mechanicum Tech-Priests swore to Angron and his Legion directly many oaths of fealty and entered pacts of mutual protection and support. This provided the World Eaters and their Techmarines with a ready source of resupply and armament far outside the Imperium's inner sphere. The campaign that was to follow would last eleven standard years and see no fewer than 48 worlds and outposts ravaged and destroyed by the World Eaters, and 7 separate dangerous xenos species, including a branch of the Lacrymole, rendered extinct as the XII Legion's fleet cut a swathe of destruction through the wastes of Golgotha, and even into the Maelstrom itself.
ca. 900s.M30 Liberation of Alpha Shalish World Eaters 13th Expeditionary Fleet, Imperialis Auxilia, Titans of Legio Audax & Mechanicum assets Alpha Shalish It was during the XII Legion's campaign in the Golgotha Sector that the World Eaters' 203rd Expeditionary Fleet encountered the Lacrymole-infested world of Alpha Shalish. Remembrancers and Imperial artist-scribes of the 203rd Expeditionary Fleet recorded the auspicious events surrounding the liberation of the xenos-controlled world of Alpha Shalish. The Imperial forces, spearheaded by World Eaters Space Marines, burst into the mounded Lacrymole cities with righteous fury, cleansing the planet of their foul, man-eating kind with extreme prejudice.
ca. 900s.M30 Ghenna Massacre World Eaters, 13th Expeditionary Fleet, Titans of Legio Audax, Imperialis Auxilia & Mechanicum assets Ghenna As the Great Crusade wore on there were increasingly those in the Imperial military who whispered that Angron was mad and his Legion had followed with him into madness. These whispers became openly voiced as widespread discontent and demands for censure when stories began to circulate that Angron had ordered his Apothecarion to conduct widespread psycho-surgery, and implantation of the so-called Butcher's Nails cranial implants, after the infamous Ghenna Massacre came to light. This action, undertaken at Angron's instigation, resulted in the entire planetary population that had rebelled against its installed Imperial Commander being wiped out in a single night of extraordinary bloodshed. The psychic screams of the dying were reported to have been audible by Astropaths half a sector distant.
ca. 900s.M30 Night of the Wolf World Eaters & Space Wolves Ghenna After Ghenna the Emperor was moved to act and called Angron before him for reprimand. He sent Leman Russ and his Space Wolves to Ghenna, to submit before them and be brought back to Terra for judgement and sensor. Russ warned Angron that the Emperor had ordered the end of such prohibited surgery in the Legion. Though the Wolf King tried to talk sense into his blood-maddened brother, Angron refused to listen to reason. Eventually, with tensions rising on both sides, an inevitable confrontation took place. No one is exactly sure who started the melee, but Russ wisely chose to order his Legion to withdraw, as both Legions faced mutual annihilation if they continued their course. The World Eaters were later issued with orders to depart to the northern fringes of known space, there to harry and reave against xenos far from the Imperium's core worlds.
921.M30 Keylek Genocide Luna Wolves, Imperialis Auxilia & Mechanicum assets Kelek Early in the Great Crusade the Luna Wolves encountered the hostile alien reptilian race known as the Keylekid on the world of Keylek. The grotesque Keylekid were greatly skilled in the arts of combat, and rose against the XVI Legion angrily the moment the 63rd Expeditionary Fleet made contact. This genocidal campaign proved to be a long, bloody, and miserable affair for the Luna Wolves.
927.M30 The Cryptosi Purgation Alpha Legion contingent vs. Cryptosi xenos Northern reaches, Unknown When an exotic, meta-dimensional strain of xenos thought to be the species later referred to in some accounts as the 'Cryptosi', a sub-company from the Alpha Legion was sent to the Imperium's northern reaches to investigate atrocities that had been committed. This campaign appears not to have been committed to record, although contact with colony worlds in that region was lost soon after, seemingly as a result of Legiones Astartes activity.
933.M30 Third Temporaferrox Extermination Iron Warriors contingent, Imperialis Auxilia & Mechanicum assets vs. Temporaferrox xenos Unknown The Iron Warriors 33rd Grand Battalion successfully conduct a successful xenocide campaign against the Temporaferrox xenos, though they suffer 78% percent casualties, all xenos life-forms are destroyed. The Iron Warriors high command deems these losses as acceptable.
941.M30 Compliance of 63-8 (Davin) Luna Wolves, Imperialis Auxilia & Mechanicum assets Davin The Feral World of Davin is brought into Compliance by the Luna Wolves Legion. The warrior tribes were allowed to remain mostly intact as they had impressed Horus with their courage on the battlefield and their willingness to learn to adapt to Imperial culture. The Luna Wolves departed after the surrender of the Davinites, taking with them their concept of the Warrior Lodge, which were quickly adopted throughout the Luna Wolves fleet. A detachment of the XVII Legion, the Word Bearers (then known as the "Imperial Heralds"), under the command of First Captain Kor Phaeron was left to shepherd the people of Davin into the light of the Imperial Truth. The Imperial governorship of the planet was give to Commander Eugen Temba of the Imperial Army, a close friend and confidante of Horus.
942.M30 Colonisation of Gethsamaine Unknown Merchant Fleet Captains Gethsamaine The world of Gethsamaine is found by Merchant Fleet Captains on the far edge of the Cyclops Cluster. It was accidentally discovered after a Chartist liner went off-course in an attempted passage of the void between M'Pandex and Zarnov. Gehsamaine was found to be a lush, primordial world of steaming rain forest filled with primitive flora, but where animal life had not yet developed. It was immediately identified as a prime location for colonisation, and soon numerous warp-arks filled with teeming hives of the Segmentum Solar colonised the newly discovered world. Gethsamaine was founded with the hopes of becoming the cornerstone of a new spread of human expansion to further consolidate and exploit the nearby stars.
ca. 945.M30 Battle of Sigma 51-7 (Sarosh) Dark Angels vs. Saroshi rebels Sarosh Shortly after their entry into the Great Crusade the 4th Expeditionary Fleet of the Dark Angels reached the orbit of the planet Sarosh (officially codified as Sigma Five-One-Seven), which had formerly been commanded by an officer of the White Scars Legion. The Saroshi -- ruled by a bureaucracy -- had recently expressed their interest in becoming part of the Imperium, and the Imperials were eager to allow them in, believing that these people seemed to express the same secular beliefs as they did in the Imperial Truth. But the Saroshi (without mentioning it to the Imperial expedition) secretly worshipped Chaotic entities in the Warp they called the Melachim, and saw the anti-religious stance of the Pre-Heresy Imperium's Imperial Truth as unsuppressed evil. The Lord High Exacter, the leader of the Saroshi bureaucracy, denounced Jonson and the Emperor to the Primarch's face aboard the Dark Angels' flagship, and Lion El'Jonson responded by ramming his blade, the Lion Sword, through the fanatical Saroshi leader's body. Unknown to the Dark Angels, the Saroshi had secreted a nuclear device aboard their shuttle, intending to assassinate the fleet's entire command structure, including Jonson; however, Luther and a junior Librarian named Zahariel managed to eject the shuttle into space, causing only minor damage to the flagship. After this incident, Luther, Zahariel and five hundred other Dark Angels were sent back to Caliban in disgrace, for allowing an enemy to get a nuclear device aboard the Primarch's flagship, to oversee the recruitment of new Space Marines into the Legion from the Calibanite population.
Late 940s.M30 Discovery of Primarch Corvus Corax Emperor of Mankind's Principia Imperialis Fleet Deliverance The Emperor comes to the prison moon of Kiavahr's moon of Lycaeus, now renamed Deliverance, and reunites with his lost son Corvus Corax. He recruits his son, and after a short time together, gives him command of the XIX Legion. Corax quickly transforms his Legion into his own image and renames them the Raven Guard.
ca. 900s.M30 The Carinae Retribution Raven Guard, Imperialis Auxilia & Mechanicum assets Carinae System The conquest of the Carinae Sodality remains a black mark on the record of the Raven Guard, a campaign whose details, long suppressed by factions within the Officio Militaris, show the Raven Guard as directly responsible for the campaign's delay and the excessive casualties recorded by Imperial Army units assigned to the fighting. The Raven Guard were assigned to pacify the "Thousand moons of Carinae" -- immense void-cities that circled the otherwise planet-less primary. On one such moon, designated Zenith-312, the cities' Arch-Comptroller unleashed a terrible weapon -- an anima-phage of terrible potency that rendered men into creatures of rage and hunger, bereft of all reason and memory. The Raven Guard suffered little ill-effect, but the ordinary citizens of Zenith-312 and the mortal soldiers of the Imperial Army were reduced to a frothing, mindless horde that numbered in the tens of thousands. Immediately the Raven Guard found themselves beset on all sides, and were forced to put down those who they once called allies, granting them the mercy of death. In revenge, Corax hunted down the escaped Arch-Comptroller, and enacted a brutal and long, drawn-out death. But in their need for revenge, the Raven Guard were neglectful in their duty, allowing for the other moons to fortify themselves, drawing out what was supposed to be a relatively swift Compliance, for seven long solar months, costing thousands of Imperial lives in the process.
ca. 900s.M30 The Fall of the Lords of Gardinaal Ultramarines & Thousand Sons contingent, Iron Hands & Emperor's Children, Imperialis Auxilia & Mechanicum assets, Demi-Legio of Legio Atarus Gardinaal The Gardinaal was a solar empire comprised of eleven inhabited worlds encountered at the edge of the Dominion of Storms to the galactic east. They were a an empire who possessed a considerable might of arms, enough to give even the Expeditionary Fleets of the Great Crusade pause. When an honour guard of Thousands Sons were sent to meet with the lords of Gardinaal, at first the negotiations went well, but unfortunately, the Thousand Sons were able to detected a psychic attempt to subvert the Imperial emissaries. The nearby Ultramarines 413th Expeditionary Fleet, commanded by Master Ulan Cicerus of the XV Chapter, was forced to intervene militarily. But soon their gains were forestalled by the superior defences of Gardinaal Prime, which proved disastrous, as they utilised powerful STC weaponry and vehicles never encountered before. A blockade of the Gardinaal's system was employed. The stalemate was soon broken by a new war-host led by the Iron Hands and the Emperor's Children Legions. The Emperor's Children contingent led a diversionary attack, while the Iron Hands led a relentless and tireless assault spread over every entire world. The Ultramarines requested to lead the assault on the capital city to restore some of their lost honour, though the blood price they paid was steep. The Iron Hands fleet left the Gardinaal System shortly afterwards, its other inhabited worlds pleased to surrender unconditionally to the Imperium's mercy. Though initially faced with famine and hardship, Gardinaal soon proved a valuable addition to the Imperium and a model of Imperial Compliance.
ca. 900s.M30 Defence of Necromunda Imperial Fists Necromunda At some unknown date later in the Great Crusade, the Imperial Fists won a major victory against the Orks upon the ash wastes of the Hive World of Necromunda. The Hive Lords consented to recruits being drawn from their population in gratitude and a Fortress-Chapel was duly consecrated, but the Imperial Fists continued to refuse to accept any special rights on the worlds where their Legion recruited. Throughout the Great Crusade they refused to garrison or claim tithes of newly conquered worlds, instead opting to remain a military unit with none of the responsibilities that came with ruling a single homeworld.
ca. 900s.M30 Krypt Persecution Death Guard, Luna Wolves, Imperialis Auxilia & Mechanicum assets Krypt The Compliance of Krypt was a relatively short campaign conducted during the Great Crusade by both the Death Guard and the Luna Wolves Legions against the Orks upon the frozen plains of the world of Krypt. Fighting together for more than a week across the frozen surface of the planet, the Legiones Astartes turned the blue ice dark with xenos blood. Battle-Captain Nathaniel Garro and his 7th Great Company were known to have fought alongside the Luna Wolves' Captain Garviel Loken and his 10th Company during this action.
ca. 900s.M30 Battle of Gyros-Thravian Emperor of Mankind's Principia Imperialis Fleet, Imperial Fists, Luna Wolves & Death Guard, Imperialis Auxilia & Mechanicum assets vs. Orks Gyros-Thravian The Battle of Gyros-Thravian was a massive joint-Imperial Compliance action carried out by three Space Marine Legions, composed of the Luna Wolves, Death Guard and Imperial Fists against the extremely powerful Ork Warboss Gharkul Blackfang, one of the most powerful Ork warlords ever encountered up until that time. Despite the strength arrayed against the vile Greenskin, it was the Imperial forces who were soon on the verge of defeat. It was then that the Emperor Himself, aboard his flagship. Bucephelus, came to the aid of His sons. He personally led a force composed of 1,000 Legio Custodes into the heart of the mighty Ork horde. Blackfang was confronted by the Emperor and killed atop his Gargant while the Custodians proceeded to lay waste to the rest of the Greenskin horde. The Custodians accounted for the slaughter of the Orks, slaying over 100,000 of the savage xenos, with the loss of only three Custodians. Following their momentous victory, the Emperor commemorated the Custodians' sacrifice by engraving the names of the three fallen into his own personal Artificer Armour.
ca. 957.M30 The Melkeji Salvation Word Bearers contingent, Imperialis Auxilia & Mechanicum assets Melkeji The world of Melkeji was a planet on the trailing edge of the galactic rim which had retained many of the technological marvels of Mankind's Dark Age of Technology. Unfortunately, the human population was enthralled to nameless parasitic xenos creatures that ruled Melkeji through a class referred to as the Ascended. Knowing that they could not capture the planet, the Grand Marshal of the Expeditionary Fleet sent an Astropathic message asking for aid. Lorgar himself came to Melkeji with eight full Chapters of his XVII Legion. Through Lorgar's tactical genius and superb guile, he overwhelmingly defeated the vile xenos. The people of Melkeji knew that their masters were gone and that they were facing a power greater and more terrible than any they could have dreamed in their wildest nightmares. Most of the Melkeji surrendered at that moment, the rest a few days later. A decade after, Melkeji was a world faithful to the God-Emperor. Nearly a decade later, half a million of its sons and daughters would come to Ultramar in 007.M31 with the names of alien gods on their lips and aid the Word Bearers in the assault upon Calth.
962.M30 Pacification of the Saryine Compact Iron Warriors contingent, Imperialis Auxilia & Mechanicum assets vs. Rebellious garrison forces Unknown The Iron Warriors 282nd Grand Battalion successfully conduct the Pacification of the Saryine Compact, reducing rebellious garrison forces to 30% effective strength. The 282nd Grand Battalion suffers only 32% casualties, which leads the Battalion command to being censured for lack of zeal.
964.M30 The Razing of Monarchia Word Bearers, Ultramarines Khur Monarchia was the name of the capital city of the planet Khur, built as a beautiful shrine to the God-Emperor by the XVII Legion, the Word Bearers Space Marine Legion during the Great Crusade. Monarchia, along with its false temples, was destroyed by the warriors of the Ultramarines Legion as an object lesson in the folly of false religion. The entirety of the XVII Legion was then forced to kneel in the ashes of their devotion by the Emperor Himself, while the Ultramarines stood over them in judgement -- that which they had seen as worthy devotion now labelled treasonous. Suffering such a humiliating rebuke at the hands of the Ultramarines, this insult would apparently fester within the XVII Legion and drive them willingly into heresy.
965.M30 Compliance of 47-16 Word Bearers vs. Population of 47-16 47-16 Forty-Seven Sixteen was the first world brought into Imperial Compliance after the rebuke of the Word Bearers by the Emperor on the world of Khur. The lost human world had at first rejoiced to be reunited with their long-lost brothers from the stars. But the Word Bearers immediately initiated military action in the form of an orbital bombardment that wiped out nearly every single city with the exception of one. The now corrupted XVII Legion used the excuse that they did not have the time necessary to convert the population of Forty-Seven Sixteen to the Imperial Truth, and since their supposed profane beliefs were deemed incompatible with the Imperium's order, the world of Forty-Seven Sixteen would have to be purged. The Primarch dismissed the fact that the people of this world worshiped the Emperor as a God and that they had somehow obtained a copy of the Lectitio Divinitatus scribed by Lorgar himself. The people of Forty-Seven Sixteen were condemned, for ignorance was no excuse for violations of the Imperial Truth.
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966.M30 Discovery of Cadia Word Bearers Cadia During the so-called "Pilgrimage of Lorgar", the spiritual quest undertaken by the Primarch Lorgar and his XVII Legion to commune with the Dark Gods. The Word Bearers' pursuit of any scrap of information that could be found on the Primordial Truth or the nature of the place where Gods and mortals could mingle ultimately led the 1301st Expeditionary Fleet to the Cadia System near the largest permanent Warp Storm in the galaxy, later known to the Imperium as the Eye of Terror. The Word Bearers laid anchor over an unknown world. They later made planetfall on the newly discovered planet, which they designated as 1301-12. There, they discovered the chaos-worshipping population. It was on Cadia that Lorgar first met Ingethal, a Daemon Prince of Chaos, who was appointed by the Ruinous Powers as a guide for Lorgar and inducted the naive Primarch into worshipping Chaos. This would lay the seeds for setting in motion the events that brought on the cataclysmic Horus Heresy nearly four decades later.
ca. Mid-900s.M30 Battle of Byzanthis Dark Angels, Imperialis Auxilia forces & Mechanicum assets vs. People of Byzanthis Byzanthis A Dark Angels' Expeditionary Fleet, under the command of Chapter Master Merir Astelan discovered the far flung world of Byzanthis during their exploration of system DX-619. Following this discovery, another Dark Angels force, under the command of Chapter Master Belath arrived in-system. The two opposing Dark Angels commanders advocated different approaches in the compliance of the newly discovered world -- Belath wanted to use military forces, while Astelan preferred to try diplomacy to win over the planet's population. However, hostilities soon broke out after an engagement between the Dark Angels and defence forces of Byzanthis, which the Legionaries easily dominated. Determined to continue a diplomatic approach, Astelan went before the Byzanthis government to plead his cause for Byzanthis to accept the Imperial Truth and join the Imperium. The proceedings were interrupted when Belath teleported directly into the session with a Terminator retinue, who proceeded to slaughter the Byzanthis delegation. Enraged, Astelan knew war was now inevitable. A campaign was fought that eventually forced Byzanthis into Imperial Compliance.
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970.M30 Pacification of Zaramund Luna Wolves, Death Guard & Dark Angels contingents Zaramund A joint-Compliance campaign is conducted by the Luna Wolves and a contingent of Death Guard led by First Captain Calas Typhon and a contingent of Dark Angels led by Luther, the acting Regent of Caliban. Following their victory, a celebration is held, but soon the festivities are marred when Lion El'Jonson arrives to rebuke Luther for disobeying his orders to remain on Caliban.
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ca. 977.M30 The Breg-shei Eradication Raven Guard & Night Lords contingents, Imperialis Auxilia & Mechanicum assets vs. Breg-shei xenos Farinatus Maximus On the world of Farinatus Maximus, a detachment of the Raven Guard under Commander Alkenor carry out a Writ of Annihilation against the xenos-species of the Breg-shei -- highly dangerous and hostile insectoid aliens which had evolved there. Operating alongside the VIII Legion, the Night Lords, the Raven Guard infiltration team led by Sergeant Dravian Klayde charged with collapsing the breg-shei's nest was discovered and killed but for the tenacious Sergeant. Having lost one arm and both of his legs, Dravian Klayde however succeeded in reaching Imperial lines, dragging himself by his sole functional arm for days on end. This feat earned him the nickname of "The Carrion", bestowed upon him by the Night Lords who found him. Klayde would undergo extensive augmentic repairs which ultimately led him to be selected for training as a Techmarine on distant Mars, thus allowing him to be present during the Schism of Mars and play an important role in it.
Late 970s.M30 Persecution of Vaomir Reaches Night Lords, Imperialis Auxilia & Mechanicum assets Vaomir Reaches Encountered through highly unusual circumstances, the Night Lords take part in the protracted persecution of the void-born Gethora Warp-Witches across the Vaomir Reaches. This was done due to the Emperor's standing edict that any alpha-level rogue psykers that were encountered were to be destroyed outright, either through Exterminatus from orbit without direct confrontation or hunted down and slain with due prejudice. Therefore, the truth of Chaos and those who promulgated such beliefs would be kept from being revealed and casting doubt on the Emperor's extorted tenets of the Imperial Truth.
976.M30 Compliance of Dwell Ultramarines, Imperialis Auxilia & Mechanicum assets Dwell The world of Dwell was brought into Imperial Compliance by the Ultramarines Legion, led by Roboute Guilliman himself. This world, settled during the Dark Age of Technology by settlers from Molech, contained a vast repository of information that would later lead the Chaos-corrupted Horus to Molech in search of the origin of the Emperor's power.
ca. Late 970s.M30 Discovery of Primarch Alpharius Omegon Luna Wolves & Forces led by Alpharius Void Battle Extant accounts state that Alpharius was discovered accidentally by the Luna Wolves when they were lured into a trap after receiving a distress beacon from one of their own battleships. When they went to assist, Horus's own flagship came under attack by an unknown enemy, and a single assassin broke into the flagship and fought his way clear to Horus' command chamber. Horus himself was forced to confront him, but thankfully, did not slay his attacker but recognised him instead as his lost brother; Alpharius. Unfortunately, the validity of this account is considered highly suspect.
981.M30 Alpharius assumes command of the XX Legion Alpha Legion
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981.M31 The Burning of the Pharun Drift Iron Warriors contingent, Imperialis Auxilia & Mechanicum assets Pharun Drift The Iron Warriors of the 3rd, 14th and 72nd Grand Battalions successfully conduct the subjugation of the rebellious population of the Pharun Drift, suffering an overall casualty rate of 42%. The 3rd Grand Battalion suffers 80% casualties. All target worlds are depopulated. These losses are deemed acceptable by Primarch Perturabo.
984.M30 Pacification of the Cheraut System Emperor's Children, Night Lords & Imperial Fists vs. rebellious Cheraut System Cheraut System Following the successful joint-Compliance of the Cheraut System, the three Primarchs met in celebration. After the celebration, the Night Lords Primarch suffered one of his violent fits that often plagued him, and Fulgrim rushed to Curze's aid. The Night Haunter then confided in his brother the dire visions that he had seen; his death at the hands of their father, that many of the Primarchs would die fighting amongst themselves, and that the light the Emperor brought to his homeworld of Nostramo would destroy it forever. Troubled by these dire portents, Fulgrim confided in his brother Rogal Dorn. Dorn took exception to this slight on the Emperor's name and confronted Curze. Shortly thereafter, Dorn was found unconscious and bleeding with great gouges of flesh ripped away from his torso. Crouching above his fallen brother was the pallid form of the Night Haunter, weeping. Wracked with self-loathing and guilt, Curze was taken into custody and exiled to his chambers, while his brother Primarchs discussed what actions to take against their deeply disturbed brother. Hours later, when the council of Primarchs finally disbanded, they found Night Haunter missing and the Imperial Fists' honour guard watching over him butchered. By the time the Primarchs gave chase, Night Haunter had already disappeared with his Legion into the Warp.
984.M30 The Destruction of Nostramo Night Lords Nostramo The destruction of Nostramo was an Exterminatus action conducted by the now-rogue Night Lords Legion after the Night Haunter's attack on Rogal Dorn towards the end of the Great Crusade, after the pacification of Cheraut. The VIII Legion willingly destroyed their own homeworld of Nostramo on the order of their Primarch, concentrating deadly lance-strikes on the planet's unstable core which resulted in tumultuous seismic activity that eventually shattered the dark planet apart in a wave of destruction. This event fulfilled the Night Haunter's vision of seeing his planet being destroyed by beams of white light that erupted from the heavens. For this crime, Curze was recalled to Terra by the Emperor to be reprimanded for his brutal tactics, but instead he joined the Warmaster Horus in open rebellion during the Horus Heresy before he could stand before his father.
989.M30 Hunting of the Ak'Haireth Alpha Legion vs. Ak'Haireth xenos Stellar wastes near Olmec In 986.M30, reports of attacks against isolated outposts and shipping in the region of the stellar wastes near Olmec indicated that the Ak'Haireth were again dangerously growing in strength and number. The Alpha Legion were assigned the order for the xenocide of the species before it could spread further. Within three sidereal years, they accomplished this feat by working in conjunction with the Magos Biologis and creating a deadly bio-weapon that poisoned their source of the Bone Drinkers nourishment -- the humans that lived on the worlds and plied the stars between those planets. The malignancy of the virus caused those Ak'Haireth that fed on them, and the generations born of them in the centuries to come, were irrevocably wiped out.
ca. 990.M30 Xenocide of the Khrave Raven Guard, Imperialis Auxilia & Mechanicum assets vs. Khrave xenos Indra-sûl Corax and his Raven Guard Legion were deployed in the far galactic north, pressing the Great Crusade's expansion past the reaches of the Segmentum Obscurus, when they discovered Indra-sûl, and the greatest Khrave dominion encountered so far in Imperial history. The Khrave were a dangerous species of psychically-gifted xenos that preyed on human worlds, enslaving entire populations to feast on them and thus strengthening themselves. After a protracted and bloody campaign, Corax successfully wipes out the Khrave and liberates Indra-sûl from their xenos masters. Unknown to the Raven Guard, the Iterators and other Imperial servants following on the heels of the XIX Legion's advance would later condemn the survivors to a living death as Servitor labourers, seeing them as corrupted in both mind and body.
Mid-900s.M30 Siege of Barrakan Dark Angels, Imperialis Auxilia & Mechanicum assets vs. Orks Barrakan This was an Imperial Compliance carried out by the Dark Angels during the Great Crusade against the Orks on the world of Barrakan. A notable campaign of this Compliance action was the defence of Firebase Endriago. A Chapter of the Dark Angels had been cut off by the Greenskins and trapped at the firebase for 18 months. By the end, the beleaguered Astartes were fighting off the alien assaults with fists and pieces of sharpened steel scavenged from bombed-out strongpoints, but through it all Brother Nemiel had never wavered. He had taunted the Greenskins relentlessly and exhorted his brothers to acts of ever-greater defiance in the face of insurmountable odds. When a Greenskin's crude axe had shattered his knee he had grabbed the beast by one of its tusks and kicked it to death just for spite. When the last line of defence was broken, he had stood his ground in the face of a massive xenos champion and fought an epic duel that had given the Chapter time to launch a counter-attack that finally exhausted the last of the enemy's strength. The next day, when relief forces finally managed to fight their way through to the firebase, Nemiel had stood on the ramparts and cheered with the rest of his brothers. It took several minutes before he registered the slaps on his shoulders and back and realised that the Chapter was not cheering for victory -- they were cheering for him. Not long after, the Chapter voted unanimously for him to take the place of Brother-Redemptor Barthiel, who had fallen during the darkest hours of the siege.
994.M30 Istvaan System first brought to Imperial Compliance Raven Guard, Imperialis Auxilia & Mechanicum assets vs. Non-compliant Istvaanians Istvaan System One of the more notable campaigns carried out by Primarch Corvus Corax and his Raven Guard Legion during the Great Crusade was the Imperial Compliance of the Istvaan System in 994.M30, located in the northern reaches of Segmentum Ultima. The Istvaan system had required force to impose compliance so an outlander was chosen rather than a local to rule, and this task was given to Vardus Praal, formerly a Major of the XIth Lastran Rifles and later career politician of the Ultima Segmentum Court.
ca. 995.M30 Pacification of the Hith System Unknown Legiones Astartes, Imperialis Auxilia' & Titans of the Legio Mortis, Legio Audax & Legio Vulpa vs. Orks of Charhack Hith System Approximately a decade prior to the events of the Istvaan III Atrocity, the pacification of the Hith System against the Orks of Charhack was the largest concentration of Imperial military force, which comprised well over 200,000 Space Marines, although exact figures could not be corroborated. These Legiones Astartes fought alongside Titan support from the Legio Mortis, Audax and Vulpa and a number of auxiliary units.
ca. 997.M30 Subjugation of Kernunnos Space Wolves 13th Company, Imperialis Auxilia & Mechanicum assets vs. non-compliant population of Kernunnos Kernunnos The Space Wolves 954th Expeditionary Fleet, comprised of the Space Wolves 13th Company under Wolf Lord Bulveye, successfully completes the conquest of the non-Compliant human world of Kernunnos.
998.M30-005.M31 Suppression of the Gordian League Dark Angels, Imperialis Auxilia & Mechanicum assets vs. Gordian League Shield Worlds of the Gordian League The Dark Angels fought this compliance campaign against the Gordian League -- a confederation of human worlds who were allied with degenerate xenos. The Dark Angels were still bogged down during this campaign in 005.M31, when they received word of Horus's treachery at Istvaan III, as well as the secession of the World Eaters, Emperor's Children and the Death Guard Legions. Jonson believed that the Dark Angels' deployment to the Shield Worlds was part of an effort to scatter the Imperium's most loyal servants as far as possible in order to minimize the number of Legions Horus would have to face at any given time. Jonson's forces were too deeply enmeshed in the Shield Worlds to respond quickly to Horus's treachery; the best estimates of the Primarch's staff indicated that it would take them nearly eight months to conclude their offensive operations, even on an emergency basis, and reposition themselves for a strike against Istvaan V. The Primarch issued orders for many of their reserve squadrons to resupply and prepare for immediate deployment to the Tanagra System. Their primary target was to secure the Forge World of Diamat. They could not afford to let the Warmaster acquire the substantial supplies and ordnance needed to fortify the world of Istvaan V against the approaching Loyalist strike force. Jonson would personally lead the expedition to Diamat, with a battle group of fifteen warships.
ca. 999.M30 Compliance of Melchior Luna Wolves & Blood Angels, Imperialis Auxilia & Mechanicum assets vs. Nephilim xenos Melchior The Imperial Compliance of Melchior was a joint campaign that was carried out by both the Luna Wolves and the Blood Angels Legions. The world was the last bastion of the xenos known as the 'Nephilim' -- a parasitic xenos race that slowly fed on humans and had claimed a hundred worlds before they had come to rest upon Melchior. Even their name, Nephilim, the name of the fallen seraphs, was a name taken from ancient human mythology. The Luna Wolves and Blood Angels stood shoulder-to-shoulder brought their full unfettered wrath down upon the upstart xenos. Caught between the brutal fury of two Space Marine Legions on Melchior's shining sands, the Nephilim were finally put to the sword.
ca. 999.M30 Pacification of Aghoru Thousand Sons, Imperialis Auxilia & Mechanicum assets vs. Aghoru The Aghoru Campaign was an Imperial Compliance action carried out by the then-loyal Thousand Sons and a small contingent of the Space Wolves Legion in the waning years of the Great Crusade. Though Imperial Compliance was successfully accomplished through diplomacy and considered a success, soon notable combat action took place between the Thousand Sons and an apparent warp denizen infestation (beings known to the local population as "Elohim") within the subterranean passages of the vast artificial peak known as "The Mountain") which the Space Wolves helped to put down.
999.M30 World-Prince Campaign Imperial Fists & Alpha Legion Unnamed World This was one of the final campaigns fought by the Imperial Fists during the waning years of the Great Crusade upon an unnamed Hive World against a non-Compliant civilisation ruled over by a monarch known as the World-Prince. Initially, the World-Prince had refused to surrender to the Imperium and stubbornly resisted the efforts of the Imperial Fists led by Lord Dorn himself. The Imperial Fists systematically fought one hive at time, and were making slow by study progress, until the Alpha Legion arrived unexpectedly. Informing their fellow Legion that they were there as allies, the Alpha Legion immediately began to begin operations against the intransigent world. Though no Alpha Legion warriors were encountered by the Imperial Fists during the campaign on the ground, their signature passing was abundantly clear, as soon, uprisings and coups began to erupt across the remaining hives, which threw the beleaguered world into absolute anarchy. Following the death of over 400 members of the World-Prince's nobility, he capitulated to Lord Dorn. Enraged, Rogal Dorn confronted Alpharius and scorned him for his disreputable way of waging war. He then ordered the Alpha Legion to cease all operations and to leave the planet. In one final act of spite, Rogal Dorn also proceeded to lay out the Alpha Legion's entire plan, and poked holes in its overall effectiveness, before walking away in disgust.
ca. 999.M30 Compliance of 670-25 (Nurth) 670th Imperial Expeditionary Fleet, Alpha Legion Imperialis Auxilia & Mechanicum assets vs. Non-compliant Nurthene Nurth The Alpha Legion responds to request for aid from the 670th Expeditionary Fleet to take part in the Imperial Compliance of the world of Nurth. Unfortunately, the planet is lost when a Chaos-tainted local military force, known as the Echvehnurth, activated a Warp-tainted artefact known as a Black Cube, as a last act of defiance. Once activated, Nurth was transformed into a world inimical to all sentient life nearly overnight, nearly wiping out all Imperial forces on the ground.
ca. 999.M30-000.M31 Ullanor Crusade Luna Wolves, Ultramarines & White Scars, multiple Imperialis Auxilia Regiments, multiple Legio Titanicus & other Mechanicum assets vs. Ork empire of Overlord Urrlak Urruk Ullanor The Ullanor Crusade was a vast Imperial assault on the Ork empire of the Overlord Urrlak Urruk, the largest such greenskin empire every encountered in mankind's history at that time. The Crusade included the deployment of 100,000 Space Marines, 8,000,000 Imperial Army troops, and thousands of Imperial starships and their support personnel. The Ullanor Crusade marked the high point of the Great Crusade's vast effort to reunite the scattered colony worlds of humanity.

Early M31Edit

Date
Event
Participating Force(s)
Location
Notes
000.M31 Triumph of Ullanor Alpha Legion, Blood Angels, Death Guard, Emperor's Children, Imperial Fists, Luna Wolves, Thousand Sons, Ultramarines, White Scars, Word Bearers, World Eaters Ullanor Following the defeat of the Orks of Ullanor, the Emperor of Mankind returned to Terra to begin work on his vast project to open up the Eldar Webway for Mankind's use. In his place to command the vast forces of the Great Crusade he left the Primarch Horus Lupercal, whom He raised to the rank of Imperial Warmaster and gave command authority over all of his fellow Primarchs and every Expeditionary Fleet of the Great Crusade.
ca. 000.M31 Ark Reach Cluster Campaign Thousand Sons, Space Wolves & Word Bearers contingents, Imperialis Auxilia & Mechanicum assets Shrike The Ark Reach Cluster had been discovered by the Word Bearers Legion's 47th Expeditionary Fleet; it was a group of binary stars occupied by a number of belligerent planetary empires that rejected the Imperium's offer to become part of the Emperor's growing demesne. This Imperial Compliance action of the Great Crusade was carried out through the combined efforts of the Thousand Sons working in concert with elements from the Space Wolves and the Word Bearers Legions. The first four star systems fell to the Word Bearers and Space Wolves. But the fifth and sixth world, known as Shrike, required the assistance of the Thousand Sons. The return to the XV Legion of the dreaded mutational "flesh-change" occurred at the conclusion of this campaign and helped to bring on the eternal enmity between the Space Wolves and the Thousand Sons, as the Space Wolves increasingly regarded the Astartes of the XV Legion as "impure".
ca. 000.M31 Subjugation of the Akum-Sothos Cluster Luna Wolves, Raven Guard, Space Wolves & Iron Warriors vs. Rebellious population of the Akum-Sothos Cluster Akum-Sothos Cluster Aukum-Sothos Cluster, which had been brought into Compliance by the Luna Wolves early in the Great Crusade had rebelled against Imperial rule due to the actions of controlling xenos. Horus had formulated a plan to cast down the so-called Unsighted Kings, the xenos-possessed leaders of the insurrection, in a lightning war that would purge the afflicted population while retaining the cluster's highly developed infrastructure for future re-population. The Warmaster's plan called for the bulk of four Legions -- the Luna Wolves, Space Wolves, Iron Warriors and Raven Guard -- to converge on the heavily fortified lair of the Unsighted Kings before a final, overwhelming assault was launched. Despite his misgivings, Corax complied, and assigned the majority of the Terran-borne veterans of the old XIX Legion as the assault's vanguard element. At the height of the battle, with the assault companies decimated and the attack faltering in the face of overwhelming fire, Corax himself led the forlorn hope, his battle cry firing the Legion to such efforts that the breach was carried and Gate Forty-Two taken. The honour of slaying the Unsighted Kings was claimed by Horus as Warmaster and at the moment of their execution, the xenos' hold over the population was dispelled. The Akum-Sothos Cluster was delivered and Horus' prize was reclaimed. The cost was terrible however, thousands of Raven Guard, the bulk of them Terran-born, had given their lives before the shattered walls.
ca. 000.M31 Cleansing of 28-3 (Laeran) Emperor's Children Imperialis Auxilia & Mechanicum assets vs. Laer xenos Laeran When the Emperor's Children 28th Expeditionary Fleet encountered the xenos race known as the Laer, they saw the potential for a powerful foe. Seizing the initiative, the 28th Expeditionary Fleet attacked their home world of Laeran, for Fulgrim saw the blasphemy in allowing a vile alien race to hold the ideal that they were as perfect as the human form. He ordered his Lord Commanders to attack immediately, beginning a war that the Council of Terra predicted would last for decades. Fulgrim heard this prediction, and shook his head. In one month`s time, he promised, the Imperium would rule Laeran. The Laer never surrendered -- their last warriors died fighting in the ruins of their capital city to protect their central temple dedicated to the worship of the Chaos God Slaanesh, where the Primarch discovered the mysterious Silver Blade of the Laer. This would mark the beginning of Fulgrim's and the entire III Legion's damnation and the beginning of their turn away from the service of the Emperor.
ca. 000.M31 First Kobolt War, Razing of Thuyela 40th Imperial Expeditionary Fleet, Space Wolves, Imperialis Auxilia & Mechanicum assets vs. Eldar Thuyela The 40th Expeditionary Fleet encountered a race of unusually humanoid xenos in Kobolt space who were lethal and proud, and had no interest in human affairs. The xenos' base of operations was a great transparent vessel that sparkled as if it was made of glass, and so was nicknamed by them as "Scintilla City". It was in actuality an Eldar Craftworld, and was called Thuyela in the Eldar Lexicon. True to their capricious nature, the Eldar of Thuyela attacked the 40th Expeditionary Fleet without apparent reason or explanation, and managed to fight the Imperial fleet to a standstill. Fleet commanders called for the help, which came in the form of the Space Wolves' 3rd Great Company ("Tra" Company). The Space Wolves decimated Thuyela. It was so completely destroyed that there was nothing left for the Imperial forces to recover or plunder. Horrified by their "allies'" actions, the commanders of the 40th Expeditionary Fleet were disinclined to call upon the Space Wolves for help again, but would do so when they next encountered the race known as the Olamic Quietude.
ca. 000.M31 Second Kobolt War, Suppression of the Olamic Quietude 40th Imperial Expeditionary Fleet, Space Wolves, Imperialis Auxilia & Mechanicum assets vs. Olamic Quietude Olamic Quietude homeworld The 40th Expeditionary Fleet was an expeditionary force during the Great Crusade that was shadowed by an Astartes complement made up of the Space Wolves' 3rd Great Company ("Tra" Company). During the Second Kobolt War, the 40th Expeditionary Fleet met up with the Space Wolves near Gogmagog Beta, pressing fruitlessly into the territory of the cybernetic Abhumans called the Olamic Quietude. The Space Wolves assaulted the orbital docks of the cybernetic abhumans' homeworld, and through the utilisation of specialised weapons, stealth and brute force were able to overcome their elite soldiers, known as 'Robusts'. With their defences deactivated, this allowed for the follow-on planetary assault on the Quietude's ice-covered homeworld and the inevitable destruction of their civilisation.
000-007.M31 The Chondax Campaign White Scars & Alpha Legion Chondax System Shortly after the Triumph of Ullanor, Jhagatai Khan and his V Legion were next sent to the worlds of the Chondax System. The system was comprised of the planets Epihelikon, Teras, Honderal, Laerteax and Phemus IV, the furthest of the outlying worlds. The culmination of this campaign took place upon the world of Chondax, labeled Chondax Primus EX5, 776 NC-X-S by Imperial cartographers, but named "The White World" by the White Scars due to its salt-like earth. The White World was the crucible of the whole campaign, the heart of those Greenskin forces that had chosen to go to ground in the system. The Khan was ordered by the newly-promoted Warmaster Horus to hunt the remnants of the Ork empire destroyed on Ullanor, the last slivers of the Warlord Urlakk Urruk's Greenskins. The brutal campaign lasted six long standard years as the White Scars hunted the remaining Greenskin forces to extinction. It was at Chondax that the White Scars would first learn of the outbreak of the Horus Heresy and the betrayal of Horus Lupercal. Delayed by the arrival of the fleet of the Alpha Legion, the White Scars would break-out from the Traitors' cordon and begin the long journey back to Terra in search of answers -- leaving multiple Alpha Legion warships as flaming wreckage in the bargain.
001.M31 The Council of Nikaea Blood Angels, Dark Angels, Death Guard, Emperor's Children, Imperial Fists, Thousand Sons, Salamanders, Space Wolves, Thousand Sons, Ultramarines Nikaea There was an increasing concern as the Great Crusade progressed about the use of psychic abilities. More and more often during the progress of the Imperial conquest of the galaxy, the Imperial Army and Space Marines would make planetfall only to find that the populace was in thrall to mysterious powers and unnatural mystics and so-called "sorcerers." These powers were also very akin to those used by the Thousand Sons Legion of the Primarch Magnus the Red. The Thousand Sons had come under criticism for their use of sorcery by some of their fellow Legiones Astartes. The schism grew so great that it threatened the very stability of the fledgling Imperium and so the Emperor himself had called for an Imperial conclave to resolve the issue once and for all. This conclave was held upon the world of Nikaea, which was intended to determine whether or not the use of psychic sorcery represented a boon or a grave danger to Mankind and the newborn Imperium of Man. The Council of Nikaea was also the trial of Magnus the Red, Primarch of the psychically talented Thousand Sons Legion -- for he was accused of sorcery and of introducing sorcerous practices to the Space Marine Legions through the institution of the corps of Librarians. Ultimately the existence of psykers in the Imperium was allowed but tightly restricted under centralised Imperial control, while the potent and unrestricted use of psychic abilities that was defined as sorcery was officially banned. The psychically powerful Magnus and his Thousand Sons would continue to study such powers in secret on their homeworld of Prospero, which would ultimately lead them to their damnation by the Ruinous Powers during the early days of the Horus Heresy.
ca. 001.M31 Compliance of 63-19 Luna Wolves' 63rd Expeditionary Fleet, Imperialis Auxilia & Mechanicum assets "Terra" (Falsely claimed) Forced off course by a Warp Storm, the Luna Wolves' 63rd Expeditionary Fleet discovered a system of nine planets orbiting a yellow sun quite by accident. After entering the system they were contacted by a technologically-advanced human society based on the third planet. This world was ruled by a self-appointed "Emperor of Mankind" who claimed to be the predestined ruler of all the scattered remnants of humanity across the galaxy. Though initial negotiations appeared to proceed smoothly, soon talks broke down, which resulted in rising hostilities. Horus miraculously did not order an immediate retaliatory strike. Instead, he mobilised an Astartes "speartip" unit to stand by and prepare for a planetary assault. Horus then attempted to negotiate a second time by despatching Maloghurst and another contingent of Luna Wolves, but this mission also ended in disaster when Maloghurst's Stormbird was shot down and presumed lost. massive ground assault spearheaded by the Luna Wolves was led by First Captain Ezekyle Abaddon, as well as a half-dozen Titans which provided ground support while Assault Craft provided close-air support. The Luna Wolves were eventually able to close and penetrate the capital city's defences, and came face-to-face with the so-called "Emperor". 1st Company Captain Kalus Ekaddon, commander of the Catulan Reaver Squad, swiftly killed the man he believed to be the false Emperor. Then the true false Emperor revealed himself, striking with deadly force against those Luna Wolves that were present, and nearly succeeded in neutralising both Captains Garviel Loken, Ekaddon and the other members of the Catulan Squad. He was only stopped by the timely intervention of the Luna Wolves' Primarch, as Horus teleported directly into the Throne Room and slew the false Emperor with a single, well-aimed Combi-Bolter shot to the head. The main part of the campaign was concluded with the death of the false Emperor. With the death of their leader, the main resistance on 63-19 collapsed.
ca. 001.M31 Compliance of 140-20 (Urisarach/"Murder") Blood Angels Contingent, Emperor's Children contingent, Luna Wolves, Imperialis Auxilia, Mechanicum assets & Titans of the Legio Mortis vs. Megarachnids. Urisarach/"Murder" After victory against the Laer, Lord Commander Eidolon departed the 28th Expeditionary Fleet with the elite 1st Company of the Emperor's Children to take part in the reinforcement of the Blood Angels 140th Expeditionary Fleet's compliance of the Death World of Urisarach. Unknown to the Imperial forces this planet was in actuality a prison world for the dangerous sentient xenos species known as the Megarachnids. These large arachnid-like xenos were described as too numerous and formidable to defeat without reinforcements, and caused heavy losses amongst the Imperial forces. This earned Urisarch's informal appellation of "Murder". A company of the Emperor's Children Legion under the command of Lord Commander Eidolon eventually arrived in response to the Blood Angels' distress calls, but soon took heavy casualties themselves. The situation did not improve until the arrival of the 63rd Expeditionary Fleet and a large force of Luna Wolves, tens of thousands of Imperial Army forces and Titans of the Legio Mortis deployed to the planet's surface to assist the beleaguered Legionaries. By the sixth month of the campaign it seemed the Megarachnids would soon face extinction when the fleet deployed by the Interex arrived in-system to determine who had assaulted the Megarachnids' reservation world. Finding contact with the highly-advanced humans of the Interex to be a more pressing issue that needed to be dealt with, the Commander Horus Lupercal ended the campaign against the xenos of Murder.
ca. 001.M31 Diasporex Persecution Emperor's Children & Iron Hands vs. Diasporex Void Battle During the latter part of the Great Crusade, the Iron Hands Legion's 52nd Expeditionary Fleet encountered a nomadic, fleet-based civilisation composed of both humans and xenos known as the Diasporex. The Iron Hands shared the Imperial Truth of the Emperor of Mankind and offered the human members of the Diasporex the opportunity to separate from their alien allies and to join the newly forged Imperium, but they declined the Astartes' offer. Their offer rejected, the Iron Hands passed judgement, and in the following months the Iron Hands fleet attempted to annihilate the Diasporex, but they proved to be highly skilled and experienced in the realm of naval warfare. The Emperor's Children of the 28th Expeditionary Fleet were called in as reinforcements, and so, a joint Imperial strike force composed of both the Iron Hands and forces from the Emperor's Children Legion prepared to launch an all-out assault against the willful Diasporex. During the massive naval battle that ensued Fulgrim's personal gunship, the Firebird, came under heavy attack and soon found itself in trouble. Rushing to his brother's side, Ferrus Manus' flagship, the Battle Barge Fist of Iron, came rushing to the rescue of his beleaguered brother. Due to the continuing influence of the daemonically-possessed Silver Blade of the Laer still in Fulgrim's possession, the Phoenician's pride was wounded. He felt that his brother Ferrus Manus had slighted him and was convinced that he was acting both prideful and that his actions were rash, instead of seeing them as the truly were -- humble and heroic. This drove a further wedge between the two brothers that would eventually come to a head years later.
ca. 001.M31 Compliance of 154-4 (Ibsen) Salamanders, Iron Hands Death Guard, Imperialis Auxilia & Mechanicum assets Ibsen This was a joint compliance carried out by multiple Legiones Astartes on the verdant world of Ibsen, The population of this world was a rare example of Eldar/Human coexistence. Upon further inspection, it was discovered that these human were in fact descendants of the Salamanders' home world of Nocturne who had been liberated from Dark Eldar captivity by their Craftworld kin. During the campaign the Iron Hands' Primarch, Ferrus Manus, went missing temporarily, as two Eldar Seers attempted to show him precognitive visions of the future and warn him of his impending doom. The Gorgon dismissed this visions as a simple trick. With the population fighting the Imperial forces at every turn, and unwillingly to accept the Imperial Truth, Vulkan was left with no other choice and ordered Ibsen and its irredeemably corrupted population cleansed by flame. He renamed the scoured, Nocturne-like Dead World that remained, be renamed Caldera. The world was now ready to receive new human colonists and to be exploited for the benefit of the Imperium.
ca. 001.M31 Compliance of 154-6 (Kharaatan) Salamanders, Night Lords, Imperialis Auxilia, Titans of the Legio Ignis & Mechanicum assets vs. Non-compliant population of Kharaatan Kharaatan Not long after the successful conclusion of the campaign on Caldera, Vulkan and his Salamanders Legion participated in another joint Imperial Compliance action on the world known as Kharaatan. Designated 154-6, the Salamanders fought alongside the Primarch Konrad Curze and his Night Lords Legion as well as Mechanicum forces of the Legio Ignis Titan Legion and several Imperial Army regiments. During this campaign Vulkan became infuriated with his brother Primarch and how his Legion brutally conducted themselves. During one notable incident, the Night Lords slaughtered the inhabitants of an entire city in order to seed fear amongst the general population. When he confronted Curze about his Legion's actions, a brief fight ensued between the two demi-gods. After the successful conclusion of this campaign, Vulkan reported Curze's conduct to both Warmaster Horus and his brother Primarch Rogal Dorn of the Imperial Fists Legion. This incident would later sow the seeds of animosity between Vulkan and his brother Curze, causing a rift that would further widen as the Great Crusade wore on. The events on Kharaatan would have far-reaching affects that wold later play a key role in what happened to Vulkan after the tragic events of Istvaan V played out.
002.M31 The Kayvas Belt Expedition Alpha Legion, Blood Angels Kayvas Belt, Unknown System Many tribes of Orks, scattered and leaderless after the hammerblow they had suffered at Ullanor during the Ullanor Crusade, had fled to the points of the etheric compass – and many had come to rest in the Kayvas Belt, where they carved new outposts out of the drifting, mineral-rich rocks, licked their wounds while they re-armed. The Alpha Legion had tracked them to their lair and petitioned the Warmaster Horus for the reinforcements required to prosecute their plan of annihilation, but after the war at the world called Murder and the disastrous engagement with the civilisation known as the Interex, the Luna Wolves had been reluctant to commit ships to Alpharius’ new campaign. In the end, it was the Blood Angels who agreed to assist their cousins in the XX Legion, with Sanguinius himself marshalling a sizable intervention to support the efforts of the 88th Expeditionary Fleet. The mission, Alpharius said, would be five standard years in execution. The Angel rejected that premise and promised it would be over in one, and he committed vessels from every active Blood Angels expeditionary fleet to the cause. Sanguinius was proved right -- more or less. Just over thirteen months after the commencement of the Kayvas initiative, the Orks were almost totally annihilated.
003.M31 The Luna Wolves are renamed the Sons of Horus
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004.M31 Davin Campaign and the Fall of Horus Sons of Horus Davin's moon Warmaster Horus is grievously wounded while fighting rebels on the moon of Davin. He is healed within the ancient Serpent Lodge of Davin but though his life is saved, his soul is forfeit to the Ruinous Powers. From this day he makes his plans to bring the Imperium to ruin and topple the Emperor from power. Though his treachery and malign intent remain hidden, he begins his far-reaching conspiracy to suborn those of his brothers' Legions and the other forces of the Imperium who will aid him and neutralise the threat of those who will not where he can, while preparing in secret to fight a sudden and ruthless civil war.
004.M31 Battle of Tarsus Emperor's Children 28th Expeditionary Fleet, Imperialis Auxilia & Mechanicum assets vs. Eldar Tarsus Primarch Fulgrim meets with the renowned Eldar Farseer Eldrad Ulthran of Craftworld Ulthwé on the Maiden World of Tarsus, in which the Farseer attempted to warn Fulgrim of the Warmaster's corruption, after being wounded by a malefic Chaos blade known as the Kinebrach Anathame, at the hands of the traitor Eugen Temba upon Davin's Nurgle-corrupted moon. Fulgrim reacted with violent outrage at the Farseer's accusations due to his close kinship with his brother Horus. This outrage was further enhanced by the corrupting influence of Fulgrim's Laer daemonblade, which darkly influenced the Primarch to reject the Eldar's truth and provoked Fulgrim into launching an unprovoked and furious attack on Eldrad and his retinue alongside his Emperor's Children Captains and his personal Phoenix Guard. In the battle that ensued, the Emperor's Children slew both the revered Eldar Wraithlord Khiraen Goldhelm and a potent Avatar of Khaine, which forced the Farseer and the other Eldar troops to sorrowfully withdraw, as they realised that Chaos had already claimed yet another of the "Mon-Keigh's" Primarchs. Yet they had succeeded in killing all of Fulgrim's elite personal Phoenix Guard before their departure. Believing the Eldar had proven themselves a treacherous xenos race that sought to divide and conquer the Imperium by spreading such lies about its leaders, Fulgrim, again under the increasing influence of the daemonblade, ordered the destruction of several other beautiful Eldar Maiden Worlds using hideous virus bombs.
ca. 004.M31 Battle of Deep Orbital DS191 Emperor's Children vs. Orks Callinedes System Following this delegation to the 63rd Expeditionary Fleet, Fulgrim announced to his senior commanders that he would lead a small force to join Ferrus Manus and his Iron Hands at Callinedes IV in the Callinedes System under the pretense of clearing it of an Ork infestation. The Primarch spearheaded the assault during the pacification of Deep Orbital DS191, leading the 1st, 2nd and 3rd Companies. During the assault, Captain Solomon Demeter, commander of the Emperor's Children's 2nd Company, found himself unsupported by the 1st and 3rd Companies as the battle-plan had laid out. Overextended and in real danger of being cut off and destroyed, the 2nd Company was only saved from certain destruction by the unplanned and timely arrival of the 10th and 13th Companies under the commands of Captains Saul Tarvitz and Lucius, two junior officers that Demeter had found himself associating more and more with as he was systematically frozen out by the III Legion's high command. A dark shroud hung over Lord Commander Vespasian after witnessing these dishonourable actions. He felt obliged to act after he observed Solomon Demeter's 2nd Company being intentionally abandoned by both Captain Kaesoron's and Vairosean's companies. It was a decision that would cost the honourable Astartes his life when he was murdered by the Chaos-corrupted Fulgrim himself.
004.M31 Vulpa Straits Hrud Migration Iron Warriors contingent, Imperialis Auxilia, Mechanicum and Legio Titanicus assets Gholgis Commanding the 51st Expeditionary Fleet, the Warsmith Barabas Dantioch led a large Iron Warriors contingent against a massive xenos incursion known as the Vulpa Straits Hrud Migration. Upon the Fortress World of Gholgis the Hrud infiltrated and destroyed the Iron Warriors garrison. The intense entropic fields generated by the migratory Hrud swarms caused stone to age and brought flesh to ruin, turning the Astartes warriors into so much dust and bones, rusting their armour and jamming their Bolters as the Iron Warriors' fortress crumbled all about them. Only then did the rachidian beasts creep out of every nook and crevice to attack, stabbing and slicing with their venomous claws. This left Warsmith Dantioch prematurely aged and crippled. Very few survivors made it out alive as Stormbirds extracted the survivors from the remains of Gholgis. Many of the Astartes died from premature aging or were left in aged, superhuman bodies. In the Hrud Migration's aftermath, the worlds of Krak Fiorina, Stratopolae and Gholghis were lost. The Warsmith questioned Primarch Perturabo's prosecution of the Hrud extermination campaign, which left half a Grand Company dead. Dantioch soon found himself relieved from command of the 51st Expeditionary Fleet and permanently garrisoned to the world of Lesser Damantyne for his presumption.
ca. 004.M31 Cleansing of Arigatta Sons of Horus, Ultramarines, World Eaters, Imperialis Auxilia & Mechanicum assets Arigatta This was an Imperial Compliance that was carried out jointly by the Sons of Horus Ultramarines and the World Eaters Legions against the world of Ariggata. When Imperial envoys arrived bearing word of the Emperor and the Imperial Truth, they were executed in a bloody gesture of independence. Most of the planet was quickly conquered, except for the massive fortress within which most of the leaders of the planet cowered. Eager to be on his way, Horus commanded Angron, Primarch of the World Eaters, to take the citadel and kill only the leaders. Eagerly, Angron led the assault. However, the fortress was heavily defended and the casualties were horrendous, a dozen World Eaters falling for every metre of land. Eventually, a ramp of corpses led up to a single breach in the wall, and the Astartes of the World Eaters Legion plunged in and slaughtered all remaining survivors, transforming the fortress into an abattoir of blood. Before Guilliman was able to confront his brother Primarchs regarding the massacre on Ariggata, the Horus Heresy erupted, both Horus and Angron spitting on their oaths of loyalty to the Emperor, and Guilliman's worst fears were confirmed.
004-007.M31 Purgation of Arkenath Ultramarines contingent, Imperialis Auxilia & Mechanicum assets vs. Vektate xenos Arkenath An Ultramarines contingent comprised of five-hundred Legionaries participate in a three-year long campaign against the Vektate xenos overmind, to free the human population of Arkenath.
004-009.M31 Signus Cluster Campaign Blood Angels vs. Forces of Chaos Signus System The bulk of the Blood Angels Legion is dispatched to the distant Signus Cluster to put down a local uprising. Knowing the IX Legion will never join his cause and fearing their Primarch, Horus sets his trap at Signus Prime, where the Blood Angels are beset by a foe none have ever faced before, the Daemon legions of the Ruinous Powers, and assailed by terrifying psychic assaults and distortions of reality.
005.M31 The Jorgall Execution Death Guard, Imperialis Auxilia, Mechanicum assets & Sisters of Silence vs. Jorgall xenos Iota Horologii System The Jorgall campaign was carried out during the Great Crusade against a xenos race of humanoid aliens known as the Jorgall. Many of these xenos featured extensive cybernetic physical enhancements to improve their physical forms and enhance their fighting abilities. Elements of the Sisters of Silence, alongside the 1st, 2nd and 7th Great Companies with Mortarion as the commander, launched an assault into the main Jorgall cylinder world. penetrated the drive cluster and took out the control of the cylinder world's motive power centre. Battle-Captain Nathaniel Garro, alongside an elite cadre from the Sisters of Silence, neutralised the construct's hatcheries. Following their hard-fought victory, there were dissenting voices from the Mechanicum contingent who petitioned Mortarion for a few days in which to loot the alien craft of technology. The Primarch, as was his prerogative, refused the request, as the letter of Malcador the Sigillite's orders -- and therefore, by extension, those of the Emperor Himself -- was that the Jorgall incursion into the sector was to be exterminated and nothing more.
005.M31 Battle of Istvaan Extremis Death Guard & Emperor's Children contingents Istvaan Extremis The elite 1st Company of the Emperor's Children Legion fought in concert with the Death Guard Legion's 7th Battle-Company, under the command of Battle-Captain Nathaniel Garro, against traitorous forces on Istvaan Extremis, the outermost planet within the Istvaan System. Whilst fighting against a powerful Slaaneshi psyker known as a Warsinger, Garro sustained serious injuries; crushing damage to his torso and arm as well as the loss of his right leg from the mid-thigh down. He was only saved from certain death by the timely ministrations of the Emperor's Children's Chief Apothecary Fabius. Taking stock of the desperate situation, the Emperor's Children Lord Commander Eidolon made use of a hitherto unknown ability -- a modified tracheal implant bonded with the Lord Commander's vocal chords, that allowed him to produce a nerve paralysing shriek similar to that employed by certain warrior breeds of the xenos Laer. This powerful ability killed the Warsinger and helped the Astartes carry the day.

SourcesEdit

  • Codex: Imperial Knights (6th Edition)
  • Codex: Space Marines (6th Edition)
  • Codex: Space Marines (5th Edition)
  • Rogue Trader (1st Edition)
  • The Horus Heresy - Book One: Betrayal by Alan Bligh
  • The Horus Heresy - Book Two: Massacre, by Alan Bligh, pp. 14-16, 19
  • The Horus Heresy - Book Three: Extermination, by Alan Bligh, pp. 22, 76-77, 106, 110, 150, 155, 255
  • The Horus Heresy - Book Four: Conquest, by Alan Bligh, pp. 68, 71-72
  • The Horus Heresy - Book Five: Tempest by Alan Bligh
  • The Horus Heresy - Book Six: Retribution by Alan Bligh
  • Warhammer 40,000: Rulebook (6th Edition)
  • Warhammer 40,000: Rulebook (5th Edition), pg. 102
  • Warhammer 40,000: Rulebook (4th Edition)
  • Warhammer 40,000: Rulebook (2nd Edition)
  • White Dwarf 321 (US), "Warhammer 40,000 Tactica: Walkers"
  • White Dwarf 140 (US), "Space Fleet"
  • White Dwarf 139 (US), "Space Fleet"
  • Warhammer 40,000: Compilation, pg. 20
  • Age of Darkness (Anthology), "The Iron Within" by Rob Sanders & "The Last Remembrancer," by John French
  • A Thousand Sons (Novel) by Graham McNeill
  • Descent of Angels (Novel) by Mitchel Scanlon
  • Fulgrim (Novel) by Graham MacNeill
  • Horus Rising (Novel) by Dan Abnett
  • False Gods (Novel) by Graham McNeill
  • Galaxy In Flames (Novel) by Ben Counter
  • Legion (Novel) by Dan Abnett
  • Prospero Burns (Novel) by Dan Abnett
  • Tales of Heresy (Anthology), "Wolf at the Door," by Mike Lee and "After Desh'ea" by Matthew Farrer
  • The First Heretic (Novel) by Aaron Dembski-Bowden

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