William Henry Harrison was an American military leader, politician, and the ninth President of the United States. He served as the first Governor of the Indiana Territory and later as a U.S. Representative and Senator from Ohio. Harrison first gained national fame for leading U.S. forces against American Indians at the Battle of Tippecanoe in 1811 and earning the nickname "Tippecanoe" . As a general in the subsequent War of 1812, his most notable contribution was a victory at the Battle of the Thames, which brought the war in his region to a successful conclusion.
When Harrison took office in 1841 at the age of 68, he was the oldest man to become President - a record that stood for 140 years, until Ronald Reagan was inaugurated in 1981 at the age of 69. Harrison died thirty-one days into his term — the briefest presidency in the history of the office. He was also the first U.S. President to die while in office. His death threw the country into a constitutional crisis.