The Battle Military_operation of Antietam , also known as the Battle Military_operation of Sharpsburg , particularly in the Southern United States , was a battle Military_operation of the American Civil War Military_operation , fought Hostile_encounter on September 17 , 1862 , between Confederate General Robert E. Lee 's Army of Northern Virginia and Union General George B. McClellan 's Army of the Potomac , near Sharpsburg , Maryland and Antietam Creek .

The Battle Military_operation of Antietam , also known as the Battle Military_operation of Sharpsburg , particularly in the Southern United States , was a battle Military_operation of the American Civil War Military_operation , fought Hostile_encounter on September 17 , 1862 , between Confederate General Robert E. Lee 's Army of Northern Virginia and Union General George B. McClellan 's Army of the Potomac , near Sharpsburg , Maryland and Antietam Creek .

After pursuing Aiming the Confederate general Robert E. Lee into Maryland , Maj. Gen. George B. McClellan of the Union Army launched Process_start attacks Attack against Lee 's army , in defensive positions behind Antietam Creek .

In the afternoon , Union Maj. Gen. Ambrose Burnside 's corps entered Becoming_a_member the action , capturing Conquering a stone bridge over Antietam Creek and advancing Cause_to_make_progress against the Confederate right .

After processing more than 12,000 Union prisoners , Jackson 's men then rushed Motion to Sharpsburg , Maryland , to rejoin Becoming_a_member Lee for the Battle Hostile_encounter of Antietam .