The biggest lesson from Vietnam for the warmongering class was: Never Draft, because the Draft stymied the whole enchilada.
* NOT casting asparagus on the protest movement of Vietnam, but it wasn't all about Peace and Anti-war. The Draft was a significant factor of resistence. And the resistence took various forms for the draftees - such as, all us Civilians not buying into military say-so. It meant that draftees didn't magically turn into good little militarists. Yip, in the latter years, things like fragging happened - not only resenting military orders but knocking off the authority figures - "By the end of the war, at least 450 officers were killed in fraggings; the U.S. military reported at least 600 U.S. soldiers killed in fragging incidents with another 1,400 dying under mysterious circumstances.[11][12]" - because the Civilian draftees didn't have their hearts into the whole demolishing of individuality and just blind following orders thing.
* So, for the CHEENEE-RUMSFELDs, lesson learned, they went for "all volunteer" model - that was their main lesson learned from Vietnam. Meaning multiple tours for the enlisted members, 3 or 4 or more years instead of the one year tours in Vietnam.
************ So will Deferments be for sale - uh, we're talking KRASNOV here! He sells (tries) everything - visas, citizen, pardons whatever. Actually, nothing new, richies paying Poors to take their place dates at least to the Civil War.