USA HISTORY

Detailed explanation-1: -These seven consisted of the Oglala, Brule, Hunkpapa, Minneconjou, Sans Arcs, Blackfeet (not to be confused with the Blackfeet tribe, above), and Two Kettle.

Detailed explanation-2: -Pushed out of their homelands on the Great Plains, these tribes arrived in Texas looking for new territory. They found a land already occupied by Jumanos, Coahuiltecans, Cocoimes, Chisos, Tobosos, Tawakonis, Wacos, Kiowas, and other tribes, creating conflict over who would control the land.

Detailed explanation-3: -As early as 1100, and no later than about 1250, most Plains residents had made this shift and were living in substantial villages and hamlets along the Missouri River and its tributaries; from north to south these groups eventually included the Hidatsa, Mandan, Arikara, Ponca, Omaha, Pawnee, Kansa, Osage, and Wichita.

Detailed explanation-4: -Great Plains Cities in this region include Austin, San Angelo, Midland and Odessa, Lubbock, and Amarillo. The Hill Country is a popular name for the area of hills along the Balcones Escarpment and is a transitional area between the Great Plains and the Gulf Coastal Plains.