> Except that, if you're at this stage, you have failed. The whole freaking point of having a military is to not let it happen. So the US military instead trains its soldiers to fly bombers and read satellite photos, because these are the skills that make you win wars before it runs you over.
Eh, not so much. I believe the term is "defense in depth." There's also the saying "don't put all your eggs in one basket."
If recent history has taught us anything, it's that a territory with a hostile armed population is extremely difficult for even the most advanced army in the world to hold. The US (or the Soviets) would have won in Afghanistan if all the Taliban was able to do was stage protest marches and write angry letters.
Also, you have to understand that there are many different scenarios to consider. For instance: someday, the enemy may be the US military itself.