The Indian Peace Commission was a group formed by an act of Congress on July 20, 1867 "to establish peace with certain hostile Indian tribes." It was composed of four civilians and three, later four, military leaders. Throughout 1867 and 1868, they negotiated with a number of tribes, including the Comanche, Kiowa, Arapaho, Kiowa-Apache, Cheyenne, Lakota, Navajo, Snake, Sioux, and Bannock. The treaties that resulted were designed to move the tribes to reservations, to "civilize" and assimilate these native peoples, and transition their societies from a nomadic to an agricultural existence.

The Sioux or Oceti Sakowin are groups of Native American tribes and First Nations people from the Great Plains of North America. The Sioux have two major linguistic divisions: the Dakota and Lakota peoples. Collectively, they are the Očhéthi Šakówiŋ, or "Seven Council Fires". The term "Sioux", an exonym from a French transcription ("Nadouessioux") of the Ojibwe term "Nadowessi", can refer to any ethnic group within the Great Sioux Nation or to any of the nation's many language dialects.