Board Thread:Warhammer 40k General Discussion/@comment-64.121.236.162-20140910042956/@comment-72.93.49.215-20140910201623

Sure but that was technically pre Heresy. The Black Legion as well as a few of the stronger legions like the Word Bearers and World Eaters did bolster their ranks significantly during the Heresy. Remember the HHeresy was 7 years not a couple of weeks.