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An Indian tribe of the Algonquin family, settled near the Black Hills before the beginning of the present century. In 1825 the first treaty of friendship was made with them by General Atkinson. The tribe separated later, and one part moved South. A number of treaties between both divisions of the tribe and the United States were executed. The failure to fulfill the one of 1861 led to war. Negotiations for peace were being made, when, on November 29, 1864, Colonel Chevington attacked the Sandy Creek village, and massacred 100 Cheyennes. A disastrous war followed. In 1865 the southern division agreed to go on a reservation, except the Dog Soldiers whose village was burned by General Hancock in 1867. This led to another disastrous war, in which General Custer defeated them at Washita. The northern band continued peaceable.