Union Soldiers Posing Next to U.S. Army Corps of Engineers Ambulance Wagons Near Falmouth, Virginia (1863)

Union soldiers posing next to U.S. Army Corps of Engineers ambulance wagons near Falmouth, Virginia, April 1863. By Timothy O'Sullivan. Animated stereoscopic photographs.

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A Mail Wagon For the Headquarters of the Army of the Potomac Near Falmouth, Virginia (1863)

A mail wagon for the headquarters of the Army of the Potomac near Falmouth, Virginia, 1863. Animated stereoscopic photographs.

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Union Cavalrymen of the 6th Pennsylvania Cavalry Regiment Posing With Their Lances in Falmouth, Virginia (1863)

Union cavalrymen of the 6th Pennsylvania Cavalry Regiment posing with their lances in Falmouth, Virginia, June 1863.

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A Union Army Balloon Corps Camp in Falmouth, Virginia (1862)

Union Army Balloon Corps camp in Falmouth, Virginia, March 1863. By James F. Gibson. Animated stereoscopic photographs.

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Union Officers Posing as if in the Middle of a Mock Brawl

"A muss at headquarters," Union officers posing as if in the middle of a mock brawl, Falmouth, Virginia, 1863. By James Gibson. Animated stereoscopic photographs taken within a fraction of a second of each other.

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