Left Chief America Horse Right Chief Red Cloud.. Sioux, broad alliance of North American Indian peoples who spoke three related languages within the Siouan language family. The name Sioux is an abbreviation of Nadouessioux (“Adders”; i.e., enemies), a name originally applied to them by the Ojibwa. The Santee, also known as the Eastern Sioux, were Dakota speakers and comprised the Mdewkanton, Wahpeton, Wahpekute, and Sisseton. The Yankton, who spoke Nakota, included the Yankton and Yanktonai. The Teton, also referred to as the Western Sioux, spoke Lakota and had seven divisions—the Sihasapa, or Blackfoot; Brulé (Upper and Lower); Hunkpapa; Miniconjou; Oglala; Sans Arcs; and Oohenonpa, or Two-Kettle. Before the middle of the 17th century, the Santee Sioux lived in the area around Lake Superior, where they gathered wild rice and other foods, hunted deer and buffalo, and speared fish from canoes. Prolonged and continual warfare with the Ojibwa to their east drove the Santee into what is now southern and western Minnesota, at that time the territory of the agricultural Teton and Yankton. In turn, the Santee forced these two groups from Minnesota into what are now North and South Dakota. Horses were becoming common on the Plains during this period, and the Teton and Yankton abandoned agriculture in favour of an economy centred on the nomadic hunting of bison. Traditionally the Teton and Yankton shared many cultural characteristics with other nomadic Plains Indian societies. They lived in tepees, wore clothing made from leather, suede, or fur, and traded buffalo products for corn (maize) produced by the farming tribes of the Plains. The Sioux also raided those tribes frequently, particularly the Mandan, Arikara, Hidatsa, and Pawnee, actions that eventually drove the agriculturists to ally themselves with the U.S. military against the Sioux tribes.Sioux men acquired status by performing brave deeds in warfare; horses and scalps obtained in a raid were evidence of valour. Sioux women were skilled at porcupine-quill and bead embroidery, favouring geometric designs; they also produced prodigious numbers of processed bison hides during the 19th century, when the trade value of these “buffalo robes” increased dramatically. Community policing was performed by men’s military societies, the most significant duty of which was to oversee the buffalo hunt. Women’s societies generally focused on fertility, healing, and the overall well-being of the group. Other societies focused on ritual dance and shamanism.Religion was an integral part of all aspects of Sioux life, as it was for all Native American peoples. The Sioux recognized four powers as presiding over the universe, and each power in turn was divided into hierarchies of four. The buffalo had a prominent place in all Sioux rituals. Among the Teton and Santee the bear was also a symbolically important animal; bear power obtained in a vision was regarded as curative, and some groups enacted a ceremonial bear hunt to protect warriors before their departure on a raid. Warfare and supernaturalism were closely connected, to the extent that designs suggested in mystical visions were painted on war shields to protect the bearers from their enemies. The annual Sun Dance was the most important religious event.Having suffered from the encroachment of the Ojibwa, the Sioux were extremely resistant to incursions upon their new territory. Teton and Yankton territory included the vast area between the Missouri River and the Teton Mountains and between the Platte River on the south and the Yellowstone River on the north—i.e., all or parts of the present-day states of Montana, North Dakota, South Dakota, Nebraska, Colorado, and Wyoming. This territory was increasingly broached as the colonial frontier moved westward past the Mississippi River in the mid-19th century. The California Gold Rush of 1849 opened a floodgate of travelers, and many Sioux became incensed by the U.S. government’s attempt to establish the Bozeman Trail and other routes through the tribes’ sovereign lands.