Continuity mistake: In the scene where we see Steve McQueen in a jeep waiting for the plane to taxi, he is chewing gum. He then he takes the gum out and sticks it on the top part of the windscreen frame of the jeep. In the next shot the jeep arrives where the plane is and there is no sign of the gum on the windscreen frame.
Continuity mistake: In the scene where we see Frank Sinatra and other soldiers leave the hospital ward, and follow a nurse into the Colonel's office to protest about the awful meals they were given to eat. On the Colonel's desk is a revolver in it's holster. In the next wide angle shot of the room the revolver is out of it's holster on the desk.