The Cheyenne Allies were a Native American tribe that formed an alliance with the ARAPAHO tribe in the 19th century. The two tribes had a long history of cooperation and mutual support, and they worked together to protect their lands and resources from encroachment by settlers. The Cheyenne and ARAPAHO tribes were also allies in the fight against the U.S. government during the Indian Wars of the late 1800s. The alliance between the two tribes was strong and lasted until the early 20th century.