Been playing "World In Conflict" a new RTS out, which posits a Soviet invasion of the US in 1989. Yes, I know it's incredibly far fetched, but the game does a very good job of making it very real, like ZSU-23-4s shooting down TV news helicopters in cutscenes
And of course, there's always that 1980s classic
Red Dawn, WOLVERINES! for inspiration.
I might try my hand at making some WIC themed scenarios in the future, just for the insanity of it all.