 Custer's 600 men entered the valley. Crazy Horse's large force met them head-on. Despite Custer's desperate attempts, they were quickly overwhelmed. Custer and his 200 men were attacked by about 3,000 warriors. Shortly, Custer and all his soldiers were dead. This battle, also called Custer's Last Stand, marked the most decisive Native American victory and the worst U.S. Army defeat in the Long Plains Indian War. Sure was.