Nope. We had evicerated the North Vietnamese Army and virtually wiped out the Viet Cong. A remarkable accomplishment given the the insane ROE's we shackled our troops with. All we needed to do was provide a modicum of support to the South Vietnamese (just like we need to be doing in Iraq).
Democrats in Congress wouldn't even do that for our allies. Tens of thousands that suppoerted a free South Vietnam were slaughtered or imprisoned when the country was overrun. Maybe we'll see a replay in Iraq in a few years...
There are more than one way to win a war, or lose it. We didn’t lose on the battlefield, but we lost. As Clauswitz said, war is the continuation of politics by other means. It doesn’t matter who won the battles, if you don’t acheive your political goals. The NV goal was to take SV and create a united communist state. Our goal was to stop them. They won, we lost.