User blog comment:Dracosaurian/Discussion of The Week: Monster Rivalries/@comment-25033519-20141124030128/@comment-6050823-20141124032020

Amatsumagatsuchi kicked out all of the Zinogres off their mountains, which was their home, claiming the mountains as its own territory. From this, some Zinogres actually did try to stay and fight the Elder Dragon, due to them not wanting to leave the mountains, though it ends pretty badly for them.