The first one was definitely a product of its time...1984.
Cold War was still hot - Reagan had just announced Star Wars defense against the Evil Empire in 1983.
We still had duck and cover drills under our desks in grade school for a nuclear attack.
The Day After TV movie had come out a year before...and we had to talk about the movie at school even though some parents wouldn't even let their kids watch it.
So when Red Dawn came out...we were like, "this could really happen!"
And then Rocky IV came out in 1985 and ruined everything by making peace with the Russkies and ending the Cold War.