The Blackfoot Nation consists of three tribes, the Pikunis or Piegans, the Bloods and the Blackfoot. Each tribe is divided into clans based on blood relationship. Many years ago, the Blackfeet ranged from North of Edmonton, Alberta to the Yellowstone River. They were quick to resent and avenge insult or wrong, but powerful and loyal allies when their friendship was won.  They were greatly feared by early American trappers and settlers because of the vigor with which they defended their hereditary hunting grounds from encroachment by later settlers.