From Library of Congress:
Caption from negative sleeve: Major Robertson’s Battery of horse Artillery, near Richmond, June 1862.
Photographed by James F. Gibson
Photograph from the main eastern theater of war, the Peninsular Campaign
Civil War glass negative collection. Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA
Record page for this image: http://www.loc.gov/pictures/item/cwp2003005952/PP/
The Horse Artillery Brigade of the Army of the Potomac was a brigade of various batteries of horse artillery during the American Civil War.
