Colonel George H. Chapman (3rd Indiana Cavalry) & staff at his headquarters. Army of the Potomac.

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Colonel George H. Chapman (3rd Indiana Cavalry) & staff at his headquarters. Army of the Potomac. Date Created/Published: between 1861 and 1869. Pictures of the American Civil War provided by LOC. Original medium: 1 negative (2 plates) : glass, stereograph, wet collodion.