Portrait of Brigadier General David McM. Gregg, officer of the Federal Army, (Major General from Aug. 1, 1864).

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Portrait of Brigadier General David McM. Gregg, officer of the Federal Army, (Major General from Aug. 1, 1864). Date Created/Published: Between 1860 and 1865. Photos of the American Civil War provided by LOC. Original medium: 1 negative : glass, wet collodion.