People forget that Vietnam was a strategic victory for the US - the Soviets were never able to secure a warm-water port (Saigon) in the Pacific, thus obviating their expansion into Southeast Asia.
Lee Kwan Yew of Singapore credits the Vietnam War and the American effort there as allowing Singapore to have time to grow in strength so that today it is one of the capitalistic powerhouses of Asia.
He says the Domino Theory is no myth.
Nobody seems to figure that out. We militarily won Viet Nam and the way we lost it was back here on college campuses and in Washington D. C.