The Iroquois , also known as the Haudenosaunee or the "People of the Longhouse", are an indigenous people of North America. In the 16th century or earlier, the Iroquois came together in an association known today as the Iroquois League, or the "League of Peace and Power". The original Iroquois League was often known as the Five Nations, and comprised the Mohawk, Oneida, Onondaga, Cayuga, and Seneca nations. After the Tuscarora nation joined the League in the 18th century, the Iroquois have often been known as the Six Nations. The League is embodied in the Grand Council, an assembly of fifty hereditary sachems.