Ulysses S. Grant (born Hiram Ulysses Grant, April 27, 1822 - July 23, 1885) was the 18th President of the United States (1869-1877). He achieved national fame as a hero of the American Civil War, in which he commanded Union forces as a general, and as general-in-chief (1864-1869).
Military historians usually place Grant in the top ranks of great generals. Thus he has been described by military historian J. F. C. Fuller as "the greatest general of his age and one of the greatest strategists of any age." His Vicksburg Campaign in particular comes in for intense scrutiny from military specialists around the world, and indeed he was the one who forced the surrender of Robert E. Lee at Appomattox. By contrast, presidential historians rank his administration near the bottom, primarily because of corruption, even though Grant's own reputation for personal integrity has remained largely intact. In recent years, his overall reputation as president has had a resurgence among some presidential scholars.