Native American Tribes series.
Sutaio
An Algonquian tribe, who lived along the James River in South Dakota in the 18th century. They were at war with the Cheyenne, their eastern neighbors to whom they were closely related linguistically. However, the two tribes finally formed an alliance and crossed the Missouri River together to the west. The Sutaio rapidly declined but kept their separate identity until about the year 1850, when they were absorbed by the Cheyenne.