Movie (1963): The Great Escape

There are plenty of movies to cover. This one is probably the most famous: "The Great Escape" starring Steve McQueen, James Garner and Richard Attenborough. It is based on the true story of a group of Allied POWs who escaped from Stalag Luft III.

According to its IMDb plot summary:

The Nazis, exasperated at the number of escapes from their prison camps by a relatively small number of Allied prisoners, relocates them to a high-security "escape-proof" camp to sit out the remainder of the war. Undaunted, the prisoners plan one of the most ambitious escape attempts of World War II.

According to this site, many of the scenes are true to life, though with the usual composite characters and mixed-up timelines.