Dan: Couple of other things: (1) Militarily, we did win Vietnam. Inarguable fact in that US forces never lost a single major battle in the entire war. Vietnam was lost on the home front, not on the battle field.
I always liked the story of the Vietnamese and American generals meeting at the close of the Vietnam war. The American general said, “You know, you never won a battle against us.” To this, the Vietnamese general replied — “That is true, but it is also irrelevant.”