It’s an oddly compelling film. The movie features incredibly overwrought acting, a fairly thin plot, and ridiculous battle scenes. Nevertheless, I can’t seem to watch even one scene without getting choked up.
John Milius directed the film. Although he never gained fame as a director, Milius did co-author Apocolypse Now and also helped pen the best scene of dialogue ever written — the tale of the USS Indianapolis as told by Richard Shaw in the film Jaws.
Here’s an extensive entry on Red Dawn in Wikipedia. Check out the diligent detailing of the alternate history that led to America’s collapse. Obviously, someone out there is a fan.