It (of course) is not Planet of the Apes, but this film was based on a novel by Pierre Boulle. The plot centers on the relationship between on Colonel Saito and British Lt. Col. Nicholson. Nicholson tries to maintain order, but several men under his command turn to sabotage the project the POWs are working on. Identify this film directed by David Lean which sees a fatally wounded Nicholson eventually destroy the project after being ordered to do so by commandos.
The Bridge on the River Kwai