From Ohio History Central
On September 29, 1817, Lewis Cass and Duncan McArthur, commissioners from the United States government, and representatives from the Wyandot Indians, the Shawnee Indians, the Seneca Indians, and the Delaware Indians began negotiations to determine the location of Native American land in Ohio. After almost one year of discussions, the parties signed the Treaty with the Wyandots, Shawnee, Senecas, and Ottawa on September 17, 1818. This treaty described the land holdings of these Native Americans in Ohio and also provided the Indians with yearly annuities. Over the next two decades, the United States government and Ohio's Indians negotiated numerous additional treaties. By the early 1840s, Ohio's Indians had relinquished control of most of their Ohio land to the United States government.