 The remaining Seneca, Cayugas, and Onondaga peoples, led by Sayenqueraghta (Old King) and his son-in-law Roland Montour, chose to settle at Buffalo Creek.Because the Seneca had been allies of the defeated British, the US forced them to cede most of their territory.By the Treaty of Big Tree in 1797, the Seneca relinquished all of Western New York except for twelve reservations, including Buffalo Creek.