Westward ExpansionGreat Sioux Reserve; Indian people that spoke three languages within Siouan language family The Santee, or the Eastern Sioux, were Dakota speakers and comprised the Mdewakanton, Wahpeton, Wahpekute and Sisseton The Teton, or the Western Sioux, spoke Lakota and had seven divisions (Sihasapa, Miniconjou, Oglala, Sans Arcs, and Oohenonpa)Indian Territory; region west of the Mississippi River that the US government reserved for the residence of Indians from about 1825 to 1906Removed from their homes east of the Mississippi The US moved the Indians because white settlers, who wanted to take over the lands on which the Indians had lived, were pressuring them The Indian Territory stretched from the Red River north to the Missouri River and west from the borders of  Arkansas, Missouri and Iowa to the 100th meridianBy the mid- 1850’s, it had been reduced to approximately the size of Oklahoma todayBattle of Little Bighorn; one of the worst defeats the US Army lost against Native American forces Took place in the southeastern Montana on June 25 and 26, 1876 Sioux and Cheyenne warriors killed US Lieutenant Colonel George A. Custer and more than 250 of his soldiers Named after a river in the battlefield Wounded Knee; a village on the Pine Ridge Reservation, a Sioux Indian reservation in South Dakota The site of two famous events in American Indian historyA massacre of Lakota Sioux Indians by US Army troops in 1890 2nd; the seizure of the village in 1973 by an armed group that included members of the American Indian Movement (AIM)Chisholm Trail; a route that Texas cowboys used in driving cattle herds north to the railroads in KansasIn 1866, Jesse drove Indian Territory (now Oklahoma) to his trading post near Wichita, Kansas (a mixed-blood Cherokee Indian trader)The trail began about 1,000 miles south of Abilene, near San Antonio, where herds of longhorn cattle abandoned by Mexican ranchers roamed wild