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The '''Doom Legion''' is a [[Space Marine Chapter]] of [[Ultramarines]] descent that had a . A majority of their the Chapter become was corrupted into the [[Chaos Space Marine]] warband known as the [[Vectors of Pox]] during the [[Abyssal Crusade]] in [[M37]].{{Fn|4}}

The Doom Legion was responsible for maintenance and garrison of the ''[[Faithful's Deliverance]]'', the pre-[[Horus Heresy|Heresy]] star fortress that overlooks the notorious [[Elusian Maze]] asteroid fields. Few other [[Space Marine]] Chapters could boast space-borne firepower of this magnitude.{{Fn|2a}}The Chapter's homeworld is the artificial planet of [[Elusia Prime]]. Though {{Fn|2b}} Over time, the Doom Legion had been was all but forgotten for so longby the rest of the Imperium, left in that distant outpost, fighting endless wars against the denizens of the accursed sector.{{Fn|4}} The Chapter's homeworld is the artificial planet of [[Elusia Prime]].{{Fn|2b}} ===Partial corruption===

===Corruption===The Doom Legion was one of the thirty Chapters sentenced to the [[Abyssal Crusade]]. Because of their duty of watching over the Elusian Maze, only six companies took part in the [[Crusade]], instead of the entire Chapter, and they . Five of these were corrupted into the [[Vectors of Pox]] warband. After the crusade, the [[Inquisition]] subjected the Doom Legion to rigorous examinations to seek for corruption, though found none.{{Fn|4}} However, the Vectors of Pox actually contacted their former brethren, attempting to convince them to also reject the Imperium. Despite the corruption of the majority of their Chapter, the remainder of the Chapter remained firmly loyal; including the [[Chapter Master]] at that time, Lord [[Konstantos]]. They killed the Vectors of Pox emissary.{{Fn|4}}

Despite the corruption of the majority of their Chapter, four Companies remained loyal; including the [[Chapter Master]] at that time, Lord [[Konstantos]]{{Fn|4}}. Currently, the The Doom Legion have appeared to have rebuilt their Chapter, as of 998.[[M41]] the Doom Legion [[Space Marine Company|4th Company]] is known to be operating in the [[Ultima Segmentum]], quelling an uprising on [[Neo Khartoum]].{{Fn|2a}}

*Lord [[Konstantos]] — Chapter Master ([[M37]]){{Fn|4}}*[[Viktarion]] — [[Space Marine Captain|Captain]] of the Doom Legion's [[First Company]]in the Abyssal Crusade; joined the Vectors of Pox{{Fn|4}}* [[Vincenzo]] — [[Chaplain]] (M37){{Fn|4}}* [[Werner]] — [[Battle Brother]] (M37){{Fn|4}}* [[Lazaric]] — [[Battle Brother]] (M37){{Fn|4}}

*{{Endn|4}}: [[Judgement (Short Story)]], pgs. 1–3