Cheyenne. The Cheyenne are an Indigenous people of the Great Plains.
   Their Cheyenne language belongs to the Algonquian language family. Today, the Cheyenne people are split into two federally recognized nations: the Southern Cheyenne, who are enrolled in the Cheyenne and Arapaho Tribes in Oklahoma, and the Northern Cheyenne, who are enrolled in the Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation in Montana.
   The Cheyenne comprise two Native American tribes, the Só'taeo'o or Só'taétaneo'o and the Tsétsêhéstâhese. The tribes merged in the early 19th century.
   At the time of their first European contact, the Cheyenne lived in what is now Minnesota. They were close allies of the Arapaho and loosely aligned with the Lakota.
   By the early 18th century, they were forced west across the Missouri River and into North and South Dakota, where they adopted the horse culture. Having settled the Black Hills of South Dakota and the Powder River Country of present-day Montana, they introduced the horse culture to Lakota people about 1730. With the Arapaho, the Cheyenne pushed the Kiowa to the Southern Plains. In turn, they were pushed west by the more numerous Lakota. The main group of Cheyenne, the Tsêhéstáno, was once composed of ten bands that spread across the Great Plains from southern Colorado to the Black Hills in South Dakota. They fought their historic enemies, the Crow and lat
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