> Vietnam - actually has great relations with the US and we won the peace.

They won the peace (and the war). You didn't win shit. You lost, badly. The wound in the American psyche by this defeat will never heal, to the point we have to witness claims such as yours.

> Afghanistan - We wanted to provide schooling for little girls and stuff like that and, well, the population didn't want it. So at some point you cut your losses.

So you lost. Mainly because you went on a military adventure, with unclear goals, with a population you didn't understand. Much like in Vietnam!

And here you are, in Iran.

I think the one lesson you did learn is to heavily control the media and the narrative. Body bags and mission failures are bad press. Lesson learned.