The Treaty of Lewistown is signed by the Shawnee and Seneca peoples, exchanging land in Ohio for land west of the Mississippi River.

On August 3, 1829, members of the Shawnee Indians and the Seneca Indians signed the Treaty of Lewistown with the United States. In this treaty, Senecas and Shawnees living at Lewistown, Ohio, relinquished their claim to the land and joined the rest of the Ohio Senecas already living on a…