During the American Revolutionary War, part of the Tuscarora and Oneida nations in New York allied with the rebel colonists. Most of the warriors of the other four Iroquois nations supported Great Britain, and many participated in battles throughout New York. They were the main forces that attacked frontier settlements of the central Mohawk and Cherry valleys. Late in the war, the pro-British Tuscarora followed Chief Joseph Brant of the Mohawk, other British-allied tribes, and Loyalists north to Ontario, then called Upper Canada by the British. They took part in establishing the reserve of the Six Nations of the Grand River First Nation in what became Ontario, Canada.