Effect on Warfare Without Vietnam

This idea came from the Famous People without Vietnam thread, and some things touched on in there.

Vietnam had a large effect on American warfare and the US military, both obvious and in ways many may not know. It created and utilized new strategies, created Generals and military me out of individuals who would have had far different lives, led to the usage of new weapons of war (and allowed those new toys to be ground tested) and so forth. It also showed the flaws in American strategy, the problems with a belief that conventional warfare was over by this point (this is the reason pilots lacked dogfight training, which wasn't amended until into the war), the inability to deal with a guerilla war, and other problems which led to various revisions. But what if, for whatever reason, Vietnam were avoided (the specifics are not important)? What would happen to warfare, the instruments of war and the military in the decades to follow?
 
A number of innovations in strategy and technology came about during the Vietnam War:

1) Air-Cav via Helicopters wouldn't have been as furthered or developed. The USA learned and used (especially during Tet) the mobility that helicopters offered to get troops to flashpoints quickly and efficiently.
2) Helicopters as gunships. Helicopters were used mainly for recon and small-scale transport before Vietnam. During Vietnam helicopters were used as stable platforms to deliver focused and directionalized fire from low level alititudes.
3) The decline of the belief of the supremacy of the tank. I can't prove this, but I believe that Vietnam was the first conflict in which the realization of the MBT as the main weapon of war came into doubt. APCs and Air-Cav yes, but tanks were unable to be used effectively in Vietnam and where they were they suffered an atrocious break-down and loss rate. Obviously, huge investment still went into the MBT for the European theatre as it was believed that pitched battles with conventional armour would decide the day.
4) The growth and use of personal body armour. Ballistic vests and other coverings were first heavily used in Vietnam. Body armor allowed for low flying aircraft and helicopter pilots and crew to protect themselves for bullet fire from below. Vietnam saw the use of a large and varying number of personal ballistics protections and the 60s also saw the invention of nylon-fibre and kevlar (although I don't think kevlar was actually used until 75 is was invented in 65-66).
5) Huge improvements in survival rates for seriously wounded soldiers. Because of advancements in battlefield medicine and the ability of helicopters the number of seriously wounded casualties who survived increased exponentially. So much so, that when compared to the survival rate of car accident victims (study conducted in 1966) in California, those wounded on the battlefield in Vietnam had a better survival rate.
 
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