GMAT
The Battle of Antietam, on September 17, 1862 between Lee's Confederates and the Army of the Potomac under McClellan, have the rank of the single-day battle in American history, having lost almost 23,000 casualties from the two sides.
The Battle of Antietam, on September 17, 1862 between Lee's Confederates and the Army of the Potomac under McClellan, ranks as the bloodiest single-day battle in American history, with almost 23,000 casualties from the two sides.
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