Army and Corps Headquarters Markers
The marker is a 4.5 inch Siege Rifle (sometimes called a 4.5 inch Ordnance Rifle) cast in 1863 by the Fort Pitt Foundry in Pittsburgh. It was placed in 1913 by the Gettysburg National Military Park Commission.
Text from the Headquarters Marker
Army of the Potomac
2d Corps Headquarters
Major General Winfield S. Hancock,
July 1, 2, 3, 1863
Location of the marker
The Union 2nd Corps headquarters marker is south of Gettysburg. It is on the north side of Pleasonton Avenue just north of the State of Pennsylvania monument. (39° 48.495′ N, 77° 14.094′ W)

