<Li> 1st Brigade, 1st Division, XX Corps </Li> <Tr> <Th> Battles / wars </Th> <Td> American Civil War </Td> </Tr> <P> Benjamin Harrison (August 20, 1833--March 13, 1901) was an American politician and lawyer who served as the 23rd President of the United States from 1889 to 1893 . He was a grandson of the ninth president, William Henry Harrison, creating the only grandfather - grandson duo to have held the office . He was also the great - grandson of Benjamin Harrison V, a founding father . Before ascending to the presidency, Harrison established himself as a prominent local attorney, Presbyterian church leader, and politician in Indianapolis, Indiana . During the American Civil War, he served in the Union Army as a colonel, and was confirmed by the U.S. Senate as a brevet brigadier general of volunteers in 1865 . Harrison unsuccessfully ran for governor of Indiana in 1876 . The Indiana General Assembly elected Harrison to a six - year term in the U.S. Senate, where he served from 1881 to 1887 . </P> <P> A Republican, Harrison was elected to the presidency in 1888, defeating the Democratic incumbent, Grover Cleveland . Hallmarks of Harrison's administration included unprecedented economic legislation, including the McKinley Tariff, which imposed historic protective trade rates, and the Sherman Antitrust Act . Harrison also facilitated the creation of the national forest reserves through an amendment to the Land Revision Act of 1891 . During his administration six western states were admitted to the Union . In addition, Harrison substantially strengthened and modernized the U.S. Navy and conducted an active foreign policy, but his proposals to secure federal education funding as well as voting rights enforcement for African Americans were unsuccessful . </P>

Who was the only us president whos grandfather was also president