Board Thread:Discussions/@comment-29900155-20171122003320/@comment-24909831-20180103232934

I don't see any possible explanation for a chapter to be of traitor legion origins.

If it was created of loyalist traitors, it wasn't: "There will also be no "loyalist traitors" (characters that were part of Traitor Legions and stayed loyal to the Emperor) who survive the Great Scouring."

- Canon policy

If it was created from traitor legion gene-seed, it wasn't: "There shall be no loyalist successors of Traitor Legions"

- Canon policy