On July 20, 1867, Congress established the Indian Peace Commission to negotiate peace with Plains Indian tribes who were warring with the United States. The Peace Commission met in St. Louis, Missouri, on August 6, 1867, where it elected Nathaniel G. Taylor, Commissioner of Indian Affairs, as its president. Commissioners agreed that lasting peace was contingent upon separating Indians regarded as "hostile" from those regarded as friendly, removing all Indian tribes onto reservations away from the routes of U.S. westward expansion, and making provision for their maintenance.