The Purple Stars are a Loyalist Space Marine Chapter of unknown Founding and origin. Almost nothing is known about this Chapter in Imperial records. They are rumoured to have close ties with the Adeptus Mechanicus and the Inquisition. Sometime during the 32nd Millennium, at the behest of Technomagos Ipsissimus and an unidentified emissary of the Inquisitorial Representative of the High Lords of Terra, the Purple Stars sent Epistolary Merchstrumer and half a squad of Battle-Brothers (5 Astartes) into the Eye of Terror to carry out a clandestine reconnaissance mission. But their presence did not go unnoticed for long, and soon the Purple Stars found their null ship being boarded by a large force of Chaos Space Marines. Severely outnumbered and running low on ammunition, the Purple Stars prepared to sell their lives dearly, attacking the Traitor Marines with Chainswords and Power Axes in a futile attempt to repel them. The Purple Stars Astartes were wiped out, with the exception of two lone survivors: one was the Purple Stars Librarian Merchsturmer and the other was the ship's Astropath. Though mortally wounded, the Librarian had managed to acquire his fallen Battle-Brothers' Progenoid Glands, to be implanted into a future generation of Purple Stars Astartes. Before dying, Mechsturmer passed on a dire warning to the Imperium of Man -- another Black Crusade of Abaddon the Despoiler was fast approaching.
The Purple Stars' Chapter colours are not listed in current Imperial records. The only thing of note is that the Librarians of this Chapter wear ebon coloured Power Armour instead of the usual blue panoply of a Librarian.
The Purple Stars' Chapter badge is not listed in current Imperial records.
- Eye of Terror (Novel) by Barrington J. Bayley