The Plains Indians were a group of Native American tribes that lived on the Great Plains of North America. The Arapahos, Poncas, Kiowas, Otos, Osages, Omahas, Otoe, Utes, Kiowa, and Osage were all part of this group. They were nomadic hunter-gatherers who followed the buffalo herds for sustenance. They also engaged in trade with other tribes and Europeans. They were known for their skill in horsemanship and warfare.