Among the unfair treatment of the Plains Indians when white settlers expanded westward, the U.S. federal government massacred Native American tribes who thought they were at peace with the government and as a result many innocent people died. These incidents of discriminative killings made the distrust from the Plains Indians grow and later this distrust led to major conflicts. The U.S. killed people from the Cheyenne and Arapaho tribes even though they were friendly. The governor of the territory of Colorado said that all Native Americans who sought peace to move to nearby military posts. Chief Black Kettle and his people did as he told and thought that they were at peace. But the governor issued a proclamation that contradicted
