Continuity mistake: In the scene where Miter is planning to escape from the army and Bozz tries to stop him, watch the red mark on Miter's neck. It miraculously disappears and reappears many times. (00:45:05 - 00:48:30)
Factual error: When they are on the pistol range, the recruits are shooting with a "modern" two handed grip. In 1971, the US Army still taught recruits to shoot one-handed.