Cheyenne-Arapaho Reservation (Tsistsistas-Hinono'ei)

The Cheyenne-Arapaho Reservation (Tsistsistas-Hinono'ei) is a tribe of Native Americans historically living on the plains of Colorado and Wyoming. Following the 1867 Medicine Lodge Treaty, the Southern Cheyenne and Arapaho were forcibly removed to a newly designated reservation in western Indian Territory (headquartered later in Concho, Oklahoma), enduring severe disease, starvation, and the near-destruction of the buffalo herds. 

Arapaho (Hinono'ei) originally lived in the Great Lakes region near the Mississippi River before moving onto the Great Plains around the late 17th century. By the late 1700s, they camped near the Black Hills and formed a deep, enduring alliance with the Cheyenne.

Cheyenne (Tsistsistas) migrated from the northeast onto the Great Plains as nomadic buffalo hunters. Their territory historically stretched across the central and southern plains, recognized under the 1851 Fort Laramie Treaty.