User blog comment:Khalael/Canon Policy Discussion 1: Space Marines/@comment-2253300-20131103062707/@comment-2253300-20131103063626

Any Loyalist Traitor characters (guys in the Traitor Legions that remained loyal to the Big E, and somehow were not purged by their Legions) should all be dead. That is to say they they either died somehow during the Horus Heresy, or slightly after. It kills me to say this seeing as I have made such a character myself, but no Loyalist Traitor Dreadnoughts. Thinking back I don't think the Inquisition would let them last that long, and I highly doubt any Loyal Chapter would take them in on any kind of permanent basis.