Board Thread:Warhammer 40k General Discussion/@comment-58.178.141.62-20140405080514/@comment-116.240.148.134-20140406230430

If Arvida is the founder the question then becomes whether the Thousand Sons made up all the Founding Blood Ravens or if they were made up of  loyalist marines of other traitor legions, there would not have been many Thousand Sons not on prospero after all.