I read that Sherman appointed Phil Sheridan because he hated the Indians as much as he and Grant did. They all wanted them eradicated. There was enough mayhem to go around. The Army would attack villages and murder innocent women and children. They broke every treaty they made with the Indians. The Indians in turn would rape, murder torture and pillage settlers. Custer made a treaty with the Sous a few years I think before Little Big Horn that gave them the Black Hills but the discovery of gold there rendered that treaty null. His mission was to destroy but it got turned upside down. It is a sad part of our history. The Indians won that battle but were destined to loose the war.