 The Iroquois Confederacy was an alliance of tribes, originally from the upstate New York area consisting of the Seneca, Cayuga, Onondaga, Oneida, Mohawk, and, later, Tuscarora.In pre-revolutionary war days, their confederacy expanded to areas from Kentucky and Virginia north.All of the members of the Confederacy, except the Oneida and Tuscarora, allied with the British during the Revolutionary War, and were forced to cede their land after the war.