William Henry Harrison, an American military officer and politician, was the ninth President of the United States (1841), the oldest President to be elected at the time. On his 32nd day, he became the first to die in office, serving the shortest tenure in U.S. Presidential history. In the campaign against the Indians, Harrison served as aide-de-camp to General “Mad Anthony” Wayne at the Battle of Fallen Timbers, which opened most of the Ohio area to settlement. In the War of 1812 Harrison won more military laurels when he was given the command of the Army in the Northwest with the rank of brigadier general. At the Battle of the Thames, north of Lake Erie, on October 5, 1813, he defeated the combined British and Indian forces, and killed Tecumseh.