1822-1885. 18th president of the USA 1869-77. He was a Union general in the American Civil War and commander in chief from 1864. As a Republican president, he carried through a liberal Reconstruction policy in the South, although he failed to suppress extensive political corruption within his own party and cabinet, which tarnished the reputation of his presidency. The son of an Ohio farmer, he had an unsuccessful career in the army 1839-54 and in business, and on the outbreak of the Civil War received a commission on the Mississippi front. He took command there in 1862, and by his capture of Vicksburg in 1863 brought the whole Mississippi front under Northern control. He slowly wore down the Confederate General Lee's resistance, and in 1865 received his surrender at Appomattox. He was elected president 1868 and re-elected 1872.