[Comrade]

Numbers in non-Western armies have little to do with their effectiveness when fighting Western armies, even with Western equipment. Just so long as the Western army fighting them has any comparable strength at all (even lower than a 1/3), we always win in a pitched battle.
You should read Carnage and Culture by Victor Davis Hanson. He does a good job with that.

You also might want to update your doomsday scenario, it looks like it was written by a 16 year old or Tom Clancy.