Ulysses S. Grant (born Hiram Ulysses Grant) (April 27, 1822 – July 23, 1885) was general-in-chief of the Union Army from 1864 to 1865 during the American Civil War and the 18th President of the United States from 1869 to 1877.
The son of an Appalachian Ohio tanner, Grant entered the United States Military Academy at age 17. In 1846, three years after graduating, Grant served as a lieutenant in the Mexican–American War under Winfield Scott and future president Zachary Taylor. After the Mexican-American War concluded in 1848, Grant remained in the Army, but abruptly resigned in 1854. Struggling through the coming years as a real estate agent, a laborer, and a county engineer, Grant decided to join the Northern effort in the Civil War.