 It required the Seneca of western New York to cede all their reservation lands and move west of the Mississippi River, specifically to Wisconsin and Indian Territory (present-day Oklahoma), within five years.After the land sale that required the treaty fell through, the US negotiated a new treaty, which the Senate ratified in 1842.The Seneca began selling portions of the reservation in the 1840s to European Americans, members of the Ebenezer Society.