Lorn V was the 5th planet in the Lorn System and the setting for the PC Game Dawn of War - Winter Assault where the forces of the Imperial Guard and the Eldar confronted a loose alliance of Chaos Space Marines and Orks while the Necrons rose to present a threat to all of the other factions.
The Ice World of Lorn V had been governed by the Imperium of Man for millennia until the sudden arrival of a warband of World Eaters and a WAAAGH! of Orks on its frigid surface. For many years a vicious struggle raged on the snowy fields of Lorn V between these Orks and the warband of the World Eaters called the Blood Legion of Khorne that was commanded by the Chaos Champion Lord Crull. It was a one-sided fight for much of that time, as the Orks were often too divided amongst themselves as was the wont of that species to pose any threat to the World Eaters. But after the arrival of the fierce Ork Warlord Gorgutz and his reinforcing WAAAGH!, the Orks of Lorn V suddenly became a real menace for the World Eaters and managed to successfully assault one of their primary bases on that world. As a result of Gorgutz's arrival the conflict between the two sides became even more savage. General Sturnn of the Imperial Guard, having learned that the salvageable remains of an Imperator-class Titan called the Dominatus that had been knocked out of action during the Horus Heresy were still on Lorn V, launched an Imperial invasion of the icy world with his 412th Cadian Shock Troopers Regiment to reclaim both the planet and the ancient Titan for the Imperium. The Eldar of Craftworld Ulthwe (some records record it as Craftworld Biel-Tan) under the command of Farseer Taldeer also secretly invaded the planet, which had long been a secret Necron Tomb World. The undying Necrons had slumbered away the millennia in their stasis tombs while the younger races had fought for control of the freezing world far above them. The Eldar of Biel-tan had foreseen that the conflict between the Orks and the human Traitors would stir the Necrons from their uneasy sleep and they were determined to stop the awakening of another Tomb World of their ancient foes at any cost. When the 412th Cadian Shock Troopers Regiment of the Imperial Guard arrived, Lord Crull and Gorgutz struck a brief and uneasy alliance that they named the Forces of Disorder against their common Imperial and Eldar foes and worked together to obtain the power of the ancient Titan.
Imperial records are not entirely clear about the course of events during the campain but it is known that Farseer Taldeer and her Eldar was able to stop the Necrons from rising by destroying their Necron Lord, but lost one of her own Farseers to the Orks and many of her warriors to the allied Forces of Disorder. General Sturnn was killed by Gorgutz and his head was put on his "pointy stikk" along with that of the World Eaters' champion, Lord Crull, after the Orks broke their short alliance with the Traitor Marines, who were also driven from the planet and scattered after the loss of their leader. It is unknown what happened to the Titan Dominatus or the 412th Cadian Shock Troopers Regiment. Following these events, it seems that the Imperial Ultima Segmentum Command despatched Governor-Militant Lukas Alexander to the Civilised World of Kronus to track down and capture Farseer Taldeer after her actions on Lorn V. This began the campaign remembered in Imperial records as the Dark Crusade.
- Warhammer 40,000: Dawn of War - Winter Assault (PC Game)