[aguaviva]

The US hasn't won a war ever since WW2,

The 1990-1991 Gulf War, and the US-backed campaign against the Soviets in Afghanistan were major armed conflicts that the US unequivocally won.

The conflict against ISIL ("AK-47s and Toyota pickups") was essentially won (the Daesh still exist, but the ISIL no longer exists as a territorial state). There've been several smaller lesser-known conflicts post-WW2 that Wikipedia considers to be US victories ("operational successes"), as well.