I didn't march personally, but I do recall the whole thing happening, 40 years ago...
It's when I first learned the word "moratorium." I used the word moratorium the other day in a different context and some (older) guy didn't know what it meant. So I guess not everyone's heard of it.
Anyway -- it was widely felt that "Vietnam Bleeds On," and we finally extricated ourselves from the whole thing. It seemed like it took forever. But I understand the Afghanistan war is now a longer war.
It must have been something about being young, but Vietnam seemed like forever. And the last eight years -- while agonizingly slow because of George W. Bush -- doesn't feel like it compared.