American Civil War course of four years. Intense combat left 620,000 to 750,000 people dead, more than the number of U.S. military deaths in all other wars combined. The war ended when General Robert E. Lee surrendered to General Ulysses S. Grant at the Battle of Appomattox Court House. Confederate generals throughout the southern states followed suit. Much of the South's infrastructure was destroyed, especially the transportation systems. The Confederacy collapsed, slavery was abolished, and four million black slaves were freed. During the Reconstruction Era that followed the war, national unity was slowly restored, the national government expanded its power, and civil rights
Massachusetts in the American Civil War Academy at West Point, he served in the Regular Army during the Mexican–American War. At the outbreak of the Civil War, he was commissioned brigadier general and steadily rose from brigade commander, to division commander, to commander of the I Corps, which he led during the Battle of Antietam. Following that battle, he was placed in command of the V Corps and then the Center Grand Division of the Army of the Potomac, consisting of the III and V Corps. On January 26, 1863, he was promoted to command of the Army of the Potomac. Although he was successful at