The Vietnam War myth

[low_bidder]

Next thread, "The myth of the Stab in the Back Theory"

Sometimes getting out of a war is not so much a crime as getting into it in the first place. I am curious: what does this revisionist Vietnam history teach us about Afghanistan and Iraq?

Nothing. What would a broken fuel pump on your F150 teach you about the fuel injection on your Lexus?

History is history. Revisionism is politics. Sort of moving the goalposts after the game is over.
The facts are that for whatever reason, the USA engaged in the use of military power in Vietnam. For whatever reason, the USA withdrew that military power before the job was done. Into that power vacuum the Communists poured serious armored forces. Covered with conventional air power. Anything beyond that is conjecture and/or propaganda.
It can be argued that Vietnam was a victory, since the purpose stated BEFORE the insertion of US troops was to prevent the spread of Communism from Asia proper to the various Islands of the Pacific Rim (AKA Domino Theory). Since Communism stopped spreading in Asia post Vietnam the claim for strategic victory is supportable. Since the last picture from Vietnam is that of terrified Vietnamese hanging from the skids on a chopper as it flees, the claim of defeat is also valid.
That is because the US Army allowed themselves to be trapped in a nation building situation instead of the rear guard/holding action originally planned.
Mission creep, which brings us back to your Is Afghanistan = Vietnam question.
My opinion is 'not yet'. The Original mission to the 'stan was killing terrs. Creating a nation where none has NEVER existed is classic Mission Creep into Nation Building.
I don't fear another Vietnam, but another Bataan. Maximum logistics support by air bridge is about 100,00 troops. Light troops. Heavy cuts that number down to under 60,000. That is because there is only 1 airport that can handle the big birds. That airport is surrounded on 3 sides by hills/mountains that offer excellent cover and concealment for ManPADS.
If Pakistan cuts the supply lines, then the US Army becomes a large group of hostages. Like what happened on Bataan.