Continuity mistake: When the camp is trying to save Dunbar with the smoke screen, the smoke pattern changes between the shots. For example, the wide shot shows the smoke going off perfectly without any wind, but in the next shot when they show a close-up of the commandant going outside to see what's wrong, the smoke is now carried by a lot of wind.
Continuity mistake: The outside shots that show the barracks roof show 2 stove chimneys per barrack, but the inside shots show only 1 stove.
Continuity mistake: After one of the prisoners shouts that there are new women in the Russian camp, the men rush out to see them. On his way, animal falls in the mud, covering his backside and the backs of his legs with mud. A few moments later, he makes it to the wire and begins calling to the women. When he turns his overalls are clean.Jason Hoffman