Board Thread:Warhammer 40k General Discussion/@comment-25618639-20141206200938/@comment-8881468-20141220204420

zixis: no legion joined the ultramarines.. it is merely hinted that 2 things happened at the same time... however:

genetics do not lie.. a whole legion would stand out amongst the ultramarines... to quote "deliverance lost" corax: "my true sons will bear my mark"   then we have the true sons of horus who looked like him and so on...

(+ ultramarines had the widest recruitment base and guilliman as administrator would prolly have had good ideas on how to speed up suchg processes... whereas f.e. raven guard only recruited from deliverance, dark angels only from caliban, death guard only from barbarus   and so on.

we also know that in burning of prospero it is said that the space wolves were unleashed on one legion before