Antietam, Maryland. Captain J.M. Knap's Penn. Independent Battery "E" Light Artillery.

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Antietam, Maryland. Captain J.M. Knap's Penn. Independent Battery "E" Light Artillery. Date Created/Published: 1862 Sept. Photos of the American Civil War provided by LOC. Original medium: 1 negative (2 plates) : glass, stereograph, wet collodion.