Native American Tribes Nations and Confederacies: Gros Ventre
Gros Ventre, is the name used by the French for two quite distinct native North American groups. One was the Atsina, a detached band of the Arapaho, whose language belongs to the Algonquian branch of the Algonquian-Wakashan linguistic stock, the other was the Hidatsa, whose language belongs to the Siouan branch of the Hokan-Siouan linguistic stock. In the 18th century the Atsina roamed the plains between the Missouri and the Saskatchewan rivers under the protection of the powerful Blackfoot.
Today the Atsina live with the Assiniboin on the Fort Belknap Reservation in Montana, established in 1888. There were some 2,800 Atsina in the United States in 1990.