a river in the United States flowing from northern Wyoming to southern Montana into the Bighorn River. It was the site of the Battle of Little Bighorn: the clash between GeneralGeorge A. Custer's United States cavalry troops and several groups of AmericanIndians near the Little Bighorn River in Montana in 1876. Custer had been pursuing a group of Sioux Indians, led by Sitting Bull (1834 - 1890), who had risen in arms against settlement of the country. He seriously underestimated the size of the Sioux forces, who were supported by Cheyenne warriors. They killed Custer and every one of his soldiers. See also Sioux Indians in this glossary.—PDC Volume 5 Approved Glossary