True that, jungles and deserts are obviously not European war terrain and not one that the U.S. has been traditionally comfortable with, not to mention there has always been both an implicit and explicit 'hold back' mandate solely for the practicality of not initiating a 'true' war. While in the main the U.S. might be inhabited by morons, the military have their war geniuses, but unused and untested they are. For example, the U.S. Air Force pentagon is manned by Senior Generals that have never experienced a real combat air battle. But then that is true for most of the air forces in the world. That conflict theatre would be interesting. But the U.S. has air superiority that no other world power would dispute. Naval equipment that sits on top of the water has withered because there is not much need for naval contingencies in the desert. Also true, that the U.S. manufacturing base has been largely 'outsourced' in favor of 'technology' (not an insignificant point) which leaves it at a startup disadvantage but then that has happened before. I still remember my older brother laughing gleefully about the always impending 'world war'. He owned a couple of transmission repair shops and before bed each night he prayed for war so he could convert his shops to munitions manufacturing and make potentially millions. And around we go!