William Henry Harrison was the 9th President of the United States, serving from March 4, 1841 until his death on April 4, 1841. He was the first U.S. President to die in office and the shortest-serving President in U.S. history. Harrison was a military hero and a prominent politician in the Whig Party before his election as President. He was known for his strong leadership and his support for the development of the western frontier. Despite his short tenure, Harrison's presidency had a lasting impact on the country, particularly in the area of Indian policy.