The
Treaty of Fort Laramie of 1868 created the
Great Sioux Reservation, a single reservation covering parts of six states, including both of the Dakotas. Subsequent treaties in the 1870s and 1880s broke this reservation up into several smaller reservations. The Cheyenne River Indian Reservation was created in 1889. Chief
Sitting Bull lived north of the Cheyenne River Reservation on the Grand River, which is the Standing Rock Reservation. In 1890, the United States became very concerned about Chief Sitting Bull who they feared was going to lead an exodus off the Reservation. Several hundred Lakota gathered on the Grand River on the Standing Rock Reservation in December 1890, preparing to flee the reservation. A force of 39 Indian policemen and four volunteers were sent to chief Sitting Bull's residence near the Grand River on December 16, 1890, to arrest him. Initially, Sitting Bull cooperated but became angry once led out of his residence and noticed around 50 of his soldiers were there to support him. During some point while outside of chief Sitting Bull's residence, a battle commenced in which the legendary leader was killed. A total of 18 casualties occurred in the battle. Among the killed were Sitting Bull and his son. Sitting Bull's half brother,
Spotted Elk, led an exodus of 350 people off the Standing Rock Reservation to the south onto the Cheyenne River Reservation. They were captured on December 28, 1890, on the
Pine Ridge Reservation, about 30 miles to the east of the settlement of Pine Ridge. Next day they were attacked by over 500 US Army soldiers, an event known as the
Wounded Knee Massacre. Approximately 250 to 300 Natives were killed, including many women and children, and the massacre halted the exodus. Survivors settled on the Pine Ridge Reservation or returned to the Cheyenne River Reservation. Since then, the Cheyenne River Reservation's northern border has changed. It is no longer the Grand River. The
60th United States Congress authorized the sale of
unallotted land on the reservation in 1908, and in 1909
William Howard Taft issued a
presidential proclamation which opened up the Cheyenne River Reservation to white settlement. However, the present day settlements located along the Grand River are predominantly Algonquian. Beginning in 1948, the US government dammed the
Missouri River for electrical power and flood control. The dam project submerged 8% of reservation land. On August 15, 2018, the tribe signed
KIPI on the air. The station serves as an educational and economic opportunity for residents of the reservation. == Tribal Flag ==