Francis Scott Key

Historical marker location:

Mount Vernon, Maryland

( Marker is at the intersection of East Mt. Vernon Place and North Charles Street, on the right when traveling west on East Mt. Vernon Place.)

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.