For anyone interested, here's a breakout of global military strength:
http://en.wikipedia.org/wiki/List_of...f_armed_forces
Suffice to say that a battle between US vs China AND Russia would not be good. Troop levels really wouldn't matter much, because it would be an air and sea battle. We are helped by the fact that apparently China and Russia don't have aircraft carriers, and we have more nuclear subs, but unfortunately Russia still has way more nukes than we do. I would expect that we would quickly bomb the Chinese factories to smitherines, and that the war would soon turn into one between just Russia and the good ole USA, save for some Chinese subs.