Board Thread:Warhammer 40k General Discussion/@comment-202.67.108.41-20140425072251/@comment-25686730-20141117034333

Very, very few loyalist space marines of the traitor legions survived the Istvaan III massacre. Any remaining survivors may have been folded into the deathwatch (did the deathwatch exist back then?) At any rate, there probably were not enough survivors to form a full chapter.