Not only that, but the U.S. Army has not been involved in a long-front combined arms war with a peer-adversary since Korea in 1951-52. An actual enemy who can shoot back with artillery and rockets, who has helicopters and jets, has minute-by-minute AWACs and satellite ISR support, etc.
Since Korea, the U.S. military has always fought with total air, EW and ISR dominance. The Battle of Hue City was a skirmish compared to Mariupol or Bakhmut.
Petraeus only has experience at chasing goat herders running around with AK-47s, with the U.S. military enjoying every possible military advantage, and how did those wars turn out?
Neither has anyone else. There hasn’t been a major land war between technologically advanced, well matched opponents on a large scale since the 1980s (Arab-Israeli war in Lebanon-Syria). The Russians certainly haven’t faced anything like the Ukrainians, and they still overmatch them in many areas. And the US has vast resources, in tech and numbers, beyond what the Ukrainians have access to.
Second Battle of Fallujah was no piece of cake.
We did not lose in Afgan, Democrats gave away our victory just like they did in Vietnam.
How did the Iraq wars turn out? Total devastating victory in short order.
But let’s pretend they were all “goat herders”and our military didn’t take them off the map.
Likewise we controlled Afghanistan.
You want to equate the post war administration of the countries with stellar performance of our military.
Then let’s take a look at your variant Russians one year into a war that was supposed to take two weeks.