Trivia: Approximately half way through the movie, there's a shot of the moon with an announcement made over the system, as this was filmed on the exact same night that the first humans made their walk on the moon. From the audio commentary.
Trivia: All of the characters, based on the characters from Richard Hooker's novel, are composites of people Hooker knew, met casually, worked with, or heard about.
Trivia: Gary Burghoff as Radar was the only actor who appeared in both the movie and the TV series. [If you want to count just one show as an appearance, then G. Wood, the actor who played General Charlie Hammond from the 325th Evac in the movie, the one with the football team, was also in the pilot episode of the TV show where Hawkeye announces that Father Mulcahy is the winner of the trip to Tokyo with 'the lovely Lt. Dish'. I'm not sure that he appeared in any more episodes, but he did appear in that one. Also, Gary Burghoff was the only actor to play the same role in the movie as well as the series, but there were several other actors appearing in both.]
Trivia: When the dentist (painless) is going "to kill" himself, the officers are giving him a last dinner. And they are sitting behind the table in exactly the same positions as in Leonardo da Vinci's last supper.
Trivia: In one of the opening scenes, one of the corpsmen is running from a helicopter while carrying one end of a stretcher and he accidentally slips and falls. The director thought it was an appropriate blunder and decided to leave it in.
Trivia: The theme tune to this movie went on to top the uk singles chart in June 1980 as a result of the popularity of the spin off TV show.