Portrait of a Group of Union Engineers in a Camp During the Siege of Petersburg (1864)

Portrait of a group of Union engineers in a camp during the Siege of Petersburg, August 1864.

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Union Soldiers Posing in Front of and on a Pontoon Bridge Across the James River at Deep Bottom, Virginia, During the Siege of Petersburg

Union soldiers posing in front of and on a pontoon bridge across the James River at Deep Bottom, Virginia, during the Siege of Petersburg. Attributed to Mathew Brady.

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A Group of Union Engineers of the 12th Regiment New York State Militia Posing in Front of a Barracks Building in Camp Anderson in Washington, D.C. (1861)

A group of Union engineers of the 12th Regiment New York State Militia posing in front of a barracks building in Camp Anderson in Washington, D.C., 1861. Attributed to Mathew Brady.

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Two Views of Men Posing With the Wreckage of a Steam Locomotive Named Charles Minot Which Was Derailed During an Attack by Confederate Cavalry Near Manassas Junction, Virginia (1862)

Two views of men posing with the wreckage of a steam locomotive named Charles Minot which was derailed during an attack by Confederate cavalry in Virginia, 1862. The men, probably railroad engineers, appear to be trying to salvage the locomotive. According to Miller's Photographic History of the Civil War, this was a train derailed by Confederate cavalry near Manassas Junction in 1862. By Andrew J. Russell.

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Source 2.
Negative version of the second photograph held by the National Archives (NARA).

Time-lapse Portrait of Union Engineers in Camp During the Siege of Petersburg (1864)

Time-lapse portrait of Union engineers in camp during the Siege of Petersburg, August 1864.

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Two Views of Union Soldiers of the 50th New York Volunteer Engineer Regiment Building a Road on the South Bank of the North Anna River at Jericho Mills, Virginia (1864)

View #1.

Close-up of view #1.

View #2.

Two views of Union soldiers of the 50th New York Volunteer Engineer Regiment building a road on the south bank of the North Anna River at Jericho Mills, Virginia, May 24, 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

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Union Soldiers Building Corduroy Road Near Richmond (1862)

Union soldiers building corduroy road near Richmond, June 1862. By David B. Woodbury. Animated stereoscopic photographs.

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Two Union Engineers Posing on Ground Over Which Confederate Troops Assaulted During the Battle of Fort Sanders in Knoxville, Tennessee (1863)

Union engineers Orville Babcock and Orlando Poe posing on ground in front of Fort Sanders over which Confederate troops commanded by General Longstreet assaulted during the Battle of Fort Sanders in Knoxville, Tennessee, c. 1863. By George Barnard. Animated stereoview.

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Two Views of Union Topographical Engineers Posing in Camp Near Yorktown, Virginia (1862)

Two views of Union topographical engineers posing in camp near Yorktown, Virginia, 1862. By James F. Gibson. Animated stereoscopic photographs.

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