I think that there were two similar cathartic moments for Vietnam Vets and for U.S. citizens.
The dedication of the Vietnam War Memorial and the welcome home for the Persian Gulf War vets; a combination of memorialization and a little too over the top triumphalism, roughly nine years apart.
In the late 80s, maybe the early 90s, Australia finally decided to hold welcome home parades for its Vietnam veterans. This was nearly 20 years after they had arrived home. The veterans attended these parades en masse, and it was a massive cathartic experience for them. They finally felt welcomed home.