There were still some US forces when we left, not many but some. Of course the punchline is we never needed that treaty that the democrats never honored, we could have won the war outright. But we lacked the will to fight to win, we lacked the desire to do more than just let our military win battles, we lacked the balls to construct a series of battle plans that would have taken control of the entire country, and therefore we lost. The lesson of Vietnam is there’s a lot more to fighting a war than winning a bunch of battles, that if you’re not actually willing to win a war your record in battles doesn’t matter, that you can be 1,000,000-0 in the battle count but if you lack the commitment you’ll be 0-1 in the war.
Cicero About 2500 years ago