U.S. concern over a new Ghost Dance ceremony prompted the arrest of the Lakota Chief Sitting Bull. Dozens ended up dead, including Sitting Bull. Several hundred Lakotas headed toward the Black Hills to end things peaceably with the U.S. Army. En route, they camped at a creek called Wounded Knee. The next morning, more than 250 Lakotas – mostly women and children – were killed by U.S. soldiers.