Washington Aqueduct

Historical marker location:

11710 MacArthur Blvd., Potomac, Maryland

( Marker can be reached from MacArthur Blvd/Great Falls Road Climb east of the C&O Canal Towpath when traveling south.)

Marker installed: 1974

The Battle of Antietam was one of the bloodiest battles of the Civil War: The Battle of Antietam, which took place on September 17, 1862, was one of the bloodiest battles of the Civil War. More than 23,000 soldiers were killed, wounded, or missing after 12 hours of fighting. The battle is considered a turning point in the war, as it gave President Lincoln the opportunity to issue the Emancipation Proclamation.