User blog comment:Legionaire22/My first real AT Idea/@comment-3258762-20130723213251/@comment-3258762-20130724194902

The DG took the most losses of all legions canonically, due to the nature of their warfare. The reason it wasn't even higher was because of the blessings of nurgle.

I think the AL would turn on the Ultramarines first and foremost, seeing the rivalry between them and all.