Marine Corps Sergeant John M. Stryker is a tough guy with an even tougher job--turn a platoon of raw recruits into a combat-ready fighting machine. He pushes them mentally and physically to their limits--with discipline, hard work, and sometimes with his fists--and they hate him for it, especially Pfc. Conway (John Agar), the son of Stryker's former CO. Soon Stryker's lessons and their courage are put to the test in a costly skimish, but the worst is yet to come in one of World War II's fiercest battles, the taking of Iwo Jima. Actual combat footage and the famous flag-raising scene on Mt. Suribachi highlight this gripping human drama of heroism and conquest.