The Chandler Wobble

Historical marker location:

100 DeSellum Avenue, Gaithersburg, Maryland

( Marker is on DeSellum Avenue, 0.2 miles south of George Street, on the right when traveling south.)

Marker installed: 2011

Latitude Observatory Park.

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.