User blog comment:Gundam Legilis/Faunus... inferior or superior?/@comment-3146930-20140420025118/@comment-11188061-20140420045125

I think that one day Faunus and Humans ran into each other (Grimm population keeping them seperate before), they had a trade, and everything was peaceful. Then either the Humans saw that the Faunus (in my opinion) have superior Auric knowledge, or maybe they were sitting on a mountain of resources whatever, then decided to fabricate a plausible reason and started invading.