Walter Johnson

Historical marker location:

6400 Rock Spring Drive, Bethesda, Maryland

( Marker is on Rock Spring Drive just west of Old Georgetown Road (Maryland Route 187), on the right when traveling west.)

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.