To be honest this wasn't a great film to begin with and yes I liked it as a teenager... Kind of an useless remake of a product of another time (even in 1984 it was a dated film, without the cast of this film it would be a product of the fifties...).
But I sure laugh at Hollywood for the choice of ennemies... They can even invade the South Korea
Even if a russian invasion was ridiculous at least they were able to do it.
Somalia, Lybia or Ivory Coast would have been as good as a choice than North Korea