The thing to remember here is that the United States is seriously infected with Foreign Ideas Hostile to American Principle.
As a result, the US has not 'Gone to War' to defeat an enemy, since WW2. A war that lasted, for the US, from December 7th, 1941, until mid 1945... .
Now... from the 1940, US Army, alone... by itself went from ~200,000 to nearly 9 million troops.
As it stands now... the US Military has roughly the same man power is it did in 1941... or roughly 1.5 million troops in uniform.
Where the US were to rid ourselves of the Leftist infection, and consequently use our Military for its only legitimate purpose, which is to kill those who have harmed us and decidedly NOT to 'win the hearts and minds' of the citizens of those who harmed us..., we would have neither the trouble, nor expense, of prolonged military campaigns and the subsequent issues that come with such.
We could easily have accomplished the necessary goals in Iraq and Afghanistan, by simply having told Turkey we would be using their airspace and to not launch anything that they don't want shot down... providing our means to pinch the Iraqi Military... eviscerating it in a matter of a couple of weeks. Rubble-izing Baghdad ... and leaving a massive bounty on the head of President Hussein on the carpet of fliers we left behind warning the Iraqis that 'if we have to return to get him, we will not be so nice next time...'.
Afghanistan, should have remained a heavily supported special operations campaign. We should never have tried to set up a government in that shit-hole. The people there are simply not inclined to be governed and there's no reason why they should be. It doesn't take much government to look after goats, rocks and dirt.