Thank you for your service, when the USSR collapsed there was a brief time when their documents revealed that the "domino theory" was very true, and the 58,000 who gave the final full measure and every other warrior there stopped that from happening. Viet Nam vets have been pummeled that they were the first to lose a war in our history, the facts refute that. That information has been buried and you have to go 250 pages plus down in a google search to find it.
A Viet Nam vet friend of mine asked me once, "What's the worst thing you can do to an American GI?" I told him I didn't know. He said,"Throw a baby at him. He'll instinctively drop his weapon to protect the baby." From the look on his face I knew he had seen it more than once.