Axeman wrote:
I don't agree. The South Vietnamese did fight. The Afghan army didn't.
The South Vietnamese were never in full control of the Vietnamese government (be it South or North). If they had been in an alternate universe, and the Vietnam War went on for another 10+ years with the South Vietnamese in power, it's unclear how they'd have reacted when the USA finally pulled out in, say, the late 1980s. So, it's a weak comparison.
The anti-Taliban alliances did fight, and were actually able to take leadership positions in the country, but this role was only maintained with a persistent presence of the US Military.