Cheyenne people
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. After settling the Black Hills of South Dakota and the Powder River Country of present-day Montana and Wyoming, they introduced the horse culture to Lakota people around 1730. With the Arapaho, the Cheyenne pushed the Kiowa to the Southern Plains. In turn, they were pushed west by the more numerous Lakota.