Orcs on both sides

[Ancalagon]

Originally Posted by Inziladun

Alternately, it could be said that maybe that statement was merely a generalization of the "historian", who wanted to get across how polarizing was that war in Middle-earth.

I think i would have to agree that it was a generalisation in that sense, since 'some of every kind, even beasts and birds' could mean: there were some beasts on each side, and there were some birds on each side, but not necessarily the same type of beast or the same type of bird.