"The Maryland Campaign\u2014or Antietam Campaign\u2014occurred September 4\u201320, 1862, during the American Civil War. Confederate Gen. Robert E. Lee's first invasion of the North was repulsed by the Army of the Potomac under Maj. Gen. George B. McClellan, who moved to intercept Lee and his Army of Northern Virginia and eventually attacked it near Sharpsburg, Maryland."@en . . . . "Unionvictory" . "United States" . "Confederate States" . "1862-09-20Z"^^ . . . .