The five nations that joined to form the Iroquois League were: 1) The Mohawk 2) The Oneida 3) The Onondaga 4) The Cayuga 5) The Seneca 6) The Tuscarora
If I can remember my old local history, the Iroquois Confederacy consisted of 5 tribes or Nations. There were Iroquois, Algonquins, Onondagas, Oneidas, and one other I cannot recall. You may want to...