Sledge and the 1st Marine Division land at Okinawa. Cynical and exhausted, Sledge and Shelton show no compassion for the Japanese troops and struggle to lead new replacement Marines fresh out of boot camp. The Marines are horrified to discover Okinawan civilians, including women and children, are being forced to act as human shields. Sledge is nearly court martialed after assaulting a Japanese POW. As the battle concludes, the Marines hear of a "new bomb" that "vaporized an entire [Japanese] city in the blink of an eye".