You believe Red Dawn was plausible? No offense, but LOL.
A small band of kids defeating the entire Soviet and Cuban army certain is not plausible, but that is not what was depicted in the movie.
It was a small group of high school kids tying up and hassling the occupying forces of a single town. You can assume there were many similar groups in other occupied town across the country. That, in combination with the US Military is what defeated the Soviet and Cuban forces. As well as our allies keeping them busy on other fronts.
And looking at history (Afghanistan, Iraq, etc), yes, I think it is very plausible.
Didn’t a Japanese General/Admiral say invading the US during WWII was impractical because they would find an armed citizen behind every door?