The story begins on Makin Island on August 17, 1942. American Marine Private C. Miller watches the torture and execution of his team, and is about to be executed himself before being rescued by another squad of Marines, led by Corporal Roebuck and Sergeant Tom Sullivan. They assault the Japanese on the island, replicating the Makin Island raid. The Battle of Peleliu is then replicated. After breaking through the Japanese lines on the Peleliu beach, Miller destroys two Type 97 Chi-Ha tanks with rocket strikes, allowing the American tanks to advance. At the end of the mission, Sullivan is killed by a Japanese officer with a katana. Roebuck is promoted to Sergeant and he and his squad make their way through the Peleliu swamps to launch an assault on a Japanese-held airfield to disable anti-aircraft guns. During the assault, Miller acquires a flamethrower to destroy a bunker and a bazooka to blow up the Chi-Has positioned at the airfield.