# John Eaton

John Henry Eaton (June 18, 1790 – November 17, 1856) was an American politician and ambassador from Tennessee who served as U.S. Senator and as U.S. Secretary of War in the administration of Andrew Jackson. He was 28 years, 4 months, and 29 days old when he entered the Senate, making him the youngest U.S. Senator in history.Eaton was a lawyer in Tennessee who became part of a network that supported the political campaigns of Andrew Jackson. He also served in the militia as a major, and during the War of 1812 became an aide to Jackson; Eaton served with Jackson in all his wartime campaigns and battles, including the Battle of New Orleans.