[Rescis]

Keep in mind that the very modern, very well funded, and very well equipped US military has been fighting a bunch of dudes with rifles and IED's for the past several dozen years without conclusive victories or signs of the resistance slowing.

That US military is also neither attacking its own citizens it has filial and friendly ties with, nor attacking people who look and talk like it.

Modern armor and missiles don't accomplish much when the enemies main goal is to just live as they want to (instead of conquer territory or resources).

[nostrademons]

To be fair, the U.S. military is very effective against the individual people they are fighting at any given moment. Kill ratios in recent conflicts are of the order of 100:1. It's just that for every insurgent you kill, you create 10 more. Unless your goal is to just depopulate the rest of the globe (something I wonder about, given recent U.S. foreign policy), you can't actually win this war without addressing the conditions that lead people to hate the U.S. in the first place.