McClellan was born on December 3, 1826, Philadelphia, Pennsylvania and died on October 29, 1885 at the age of 58 in West Orange, New Jersey. He had fought in the Peninsula Campaign and Seven Days’ Battles, in which he was unsuccessful. The battle at Antietam was the only major battle McClellan won. McClellan also overestimated Confederate numbers by a long shot. Lincoln removed McClellan from the army and replaced him with Ambrose E. Burnside. During the battle at Antietam, Robert E. Lee was a commander for the Confederates during the Civil War. Robert E. Lee was the commander of the Confederates. Lee was born on January 19, 1807, Stratford, Virginia and died on October 12, 1870, Lexington, Virginia at the age of 63. Lee thought that slavery was a bad thing, but he still chose to fight only to defend his homeland. After the Civil War had ended, he and his family would move to Lexington, Virginia, where he’d become the president of Washington