Custer traveled through a snowstorm and across the South Canadian River (one of the nastiest rivers on the continent for quicksand) to attack Black Kettle's Cheyenne for not being around Ft Cobb. But they were inside their designated reservational territory and Black Kettle was flying the United States Flag he was given at the Treaty of 1851. He was told by flying the flag he would tell all he was a friend of the white man. He was attacked at Sand Creek by Chivington in 1864 and again by Custer in 1869, the second attack killed him.