Portrait of a Union Army Telegraph Operator in a Camp During the Siege of Petersburg (1864)

Portrait of a Union Army telegraph operator in a camp during the Siege of Petersburg, Virginia, August 1864. By Timothy O’Sullivan.

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Portrait of Union Soldiers of the 1st Massachusetts Volunteer Cavalry Regiment Posing in Front of Tents in a Camp During the Siege of Petersburg in Virginia (1864)

Portrait of Union soldiers of the 1st Massachusetts Volunteer Cavalry Regiment posing in front of tents in a camp during the Siege of Petersburg in Virginia, August 1864. By Timothy O’Sullivan.

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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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An Unidentified Man Posing in Front of a Union Field Hospital Near City Point, Virginia, During the Siege of Petersburg

An unidentified man posing in front of a field hospital near City Point, Virginia, during the Siege of Petersburg. Attributed to Mathew Brady. Animated stereoscopic photographs.

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A Group of Tourists Posing on Earthworks Along the Rim of the Crater Which Was Exploded at the Start of the Battle of the Crater During the Siege of Petersburg (1860's)

A group of tourists posing on earthworks along the rim of the crater which was exploded at the start of the Battle of the Crater during the Siege of Petersburg near Petersburg, Virginia, c. 1860′s. By David H. Anderson.

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A Group of Men Posing in Front of a Sutler's Tent During the Siege of Petersburg (1864)

A group of men posing in front of a sutler's tent during the Siege of Petersburg, November 1864. Animated stereoscopic photographs.

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The Bodies of Dead Confederate Soldiers in a Trench in Fort Mahone Shortly After the End of the Siege of Petersburg near Petersburg, Virginia (1865)

The bodies of two or three dead Confederate soldiers in a trench in Fort Mahone shortly after the end of the Siege of Petersburg near Petersburg, Virginia, April 3, 1865. By Thomas C. Roche. Animated stereoview.

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Union Soldiers Building Winter Quarters at Fort Brady Along the James River During the Siege of Petersburg (1864)

Union soldiers building winter quarters at Fort Brady along the James River during the Siege of Petersburg, c. 1864. Animated stereoscopic photographs.

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Portrait of Two Union Telegraph Operators at a Headquarters During the Siege of Petersburg Near Petersburg, Virginia (1864)

Portrait of two Union telegraph operators at a headquarters during the Siege of Petersburg near Petersburg, Virginia, August 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

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A Group of Union Telegraph Operators Drinking in Their Quarters Situated Near the Headquarters of the Army of the Potomac During the Siege of Petersburg

A group of Union telegraph operators drinking in their quarters situated near the headquarters of the Army of the Potomac during the Siege of Petersburg near Petersburg, Virginia. By Timothy O’Sullivan. Animated stereoscopic photographs.

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The Body of a Confederate Soldier in a Trench in Fort Mahone Who Was Killed During the Final Days of the Siege of Petersburg Near Petersburg, Virginia (1865)

The body of a Confederate soldier in a trench in Fort Mahone who was killed during the final days of the Siege of Petersburg near Petersburg, Virginia, April 3, 1865. By Thomas C. Roche. Animated stereoscopic photographs.

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The Body of a Confederate Soldier in Fort Mahone Who Was killed During the Final Days of the Siege of Petersburg (1865)

The body of a Confederate soldier in Fort Mahone who was killed during the final days of the Siege of Petersburg, April 3, 1865. By Andrew J. Russell.

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Union Soldiers Posing in a Captured Confederate Encampment During the Siege of Petersburg Near Petersburg, Virginia (1864)

Union soldiers posing in a captured Confederate encampment during the Siege of Petersburg near Petersburg, Virginia, June 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

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The Body of a Young Confederate Soldier in a Trench in Fort Mahone During the Siege of Petersburg Near Petersburg, Virginia (1865)

The body of a young Confederate soldier in a trench in Fort Mahone who was killed during the final days of the Siege of Petersburg near Petersburg, Virginia, April 3, 1865. By Thomas C. Roche. Animated stereoview.

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A Bombproof Eatery Named the "Fruit & Oyster House" Built by a Sutler During the Siege of Petersburg, Virginia (1864)

An unidentified man posing in front of a bombproof eatery set up by a sutler during the Siege of Petersburg, Virginia, c. 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

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A Union Soldier Posing in Front of a Tent in Camp During the Siege of Petersburg Near Petersburg, Virginia (1864)

A Union soldier posing in front of a tent in camp during the Siege of Petersburg near Petersburg, Virginia, August 1864. Animated stereoscopic photographs.

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Time-Lapse View of Union Soldiers Posing Around Bombproofs in the Union Siege Line During the Siege of Petersburg, Near Petersburg, Virginia (1864)

Time-lapse view of Union soldiers posing around bombproofs in the Union siege line during the Siege of Petersburg, near Petersburg, Virginia, 1864. One of the views either appears to be stretched or else was taken from a slightly different angle. By Timothy O'Sullivan.

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View of African American Union Soldiers Guarding a Section of Union Siege Line Fortifications During the Siege of Petersburg Near Petersburg, Virginia (1864)

Only two of the soldiers seem to be keeping watch on the enemy in this scene. The rest of the visible men seem relaxed and are posing for the camera.

Close-up view of a group of soldiers posing in front of their bombproof.

View of African American Union soldiers guarding a section of Union siege line fortifications during the Siege of Petersburg near Petersburg, Virginia, August 7, 1864. By Timothy O'Sullivan. Animated stereoscopic photographs.

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Two Views of an Unidentified Man Posing in Front of a Bombproof in Fort Sedgwick Which Was Built by Union Troops During the Siege of Petersburg Near Petersburg, Virginia (1865)

First view of the man posing in front of the bombproof in the foreground on the left.

View of the background on the right.

Second view of the man posing in front of the bombproof.

Two views of an unidentified man posing in front of a bombproof in Fort Sedgwick which was built by Union troops during the Siege of Petersburg near Petersburg, Virginia, 1865. A group of Union soldiers are seen posing in the background to the right of the first stereoscopic view. Animated stereoscopic photographs.

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