Union Third Corps Headquarters Marker

Army and Corps Headquarters Markers

The marker is a 4.5 inch Siege Rifle (sometimes called a 4.5 inch Ordnance Rifle) cast by the Fort Pitt Foundry in Pittsburgh. It was placed in 1913 by the Gettysburg National Military Park Commission.

Headquarters marker for Major General Daniel Sickles of the Federal 3rd Corps at Gettysburg

Text from the Headquarters Marker:

Army of the Potomac
3rd Corps Headquarters
Major General
Daniel E. Sickles
July 1, 2, 1863

Sickles-cannon-tab_4585

Location of the headquarters marker for the 3rd Corps at Gettysburg

The headquarters marker for the 3rd Corps is south of Gettysburg. It is across from the Trostle farm buildings on the south side of United States Avenue. (39°48’06.6″N 77°14’34.8″W)