I think this film has actual footage of a B-52 going down. You don't see that everyday. This isn't underground indie, it's government produced.
Folks call this propaganda. No harm, but don't let name-calling diminish another point of view. I'm sort of blown away to see a film made in Bomb-ravaged Hanoi ... in 1974! The non-linear story structure isn't Cannes worthy but it gets the job done.