400
A Tribe of the Great Plains. (there are many, just name one)
What is the Kanza (or Kaw), the Oto and Missouri, the Yankton or Teton Sioux, the Omaha, the Ponca, the Arikara, the Mandan, the Hidatsa, the Cheyenne, Plains Cree & Assinibione, the Blackfeet the Atsina or the Crow.