This was the Iroquois Confederacy.
Iroquois Confederacy or Iroquois League , North American confederation of people, initially for the Mohawk, Oneida, Onondaga, Cayuga, and Seneca. They gave their name to the Iroquoian branch of the Hokan-Siouan linguistic stock (see Native American languages ), which included numerous other Native American groups of the United States and Canada. In the early 17th cent. this confederacy of Five Nations (later to become six when the Tuscarora joined) inhabited New York state from the Hudson River to the St. Lawrence River and to the Genesee River.