The Iroquois, after becoming united in the League of Peace and Power, or Haudenosaunee, invade the Ohio River Valley in present-day Kentucky to seek additional hunting grounds.
According to one theory of pre-contact history, the Haudenosaunee have pushed Siouan-speaking tribes of the Ohio River valley, such as the Quapaw (Akansea) and Ofo (Mosopelea), out of the region by about 1200; they migrate and settle west of the Mississippi River.
