Board Thread:Warhammer 40k General Discussion/@comment-71.91.63.134-20150920063835/@comment-185.37.86.69-20151014200932

Sorry to say, but the nids had nothing to do with the lost legions. After the the two primarchs disappeared/died, the two legions was split into the other legions. In the first heretic, the Word Bearers talk about how the Ultramarines numbers went up alot, right after the two legions disappeared.