I don't see that we are in danger of a conflict with China any time soon and most of the other larger Asian nations don't have sufficient ability to project force or maintain logistical supply over a large maritime distance.
We already sell China natural resources dirt cheap, and any conflict would result in a huge shortfall in their domestic supply (especially of iron and coal) immediately. This shortfall wouldn't not be made up until after the means for production and distribution had been restarted by any occupying force. The quantity of manpower and resources that they'd have to throw at this, over thousands of miles of ocean and years of fighting is not insignificant.
Any invading or occupying force would be dealing with our defense forces, which while small are very very good. They'd also have to deal with militia units operating in terrain that's familiar with the support of the local civilian population.
So why would they bother, when they can take their present course which is to buy us out for peanuts, then sell us cheap and nasty merchandise back for profit. It wouldn't be worth the cost.
Far more likely that should China want more land, they're going to take something a lot closer to home, preferably somewhere with a contiguous land border. Makes it easier to "build" from your own back yard.
That said, I do think our military capacity needs to be vastly expanded, I'd like to see this country as an America like superpower. However due largely to environmental considerations (the lack of habitable and arable land and water) we lack the population, and thus the economic size to do it.
