Tintype Portrait of a Mounted Union Cavalryman Blowing a Bugle and Drawing His Sword During the Civil War

Tintype portrait of a mounted Union cavalryman blowing a bugle and drawing his sword in an unidentified camp during the Civil War.

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Portrait of Union General Marsena R. Patrick Posing With His Staff Officers in Culpeper, Virginia (1863)

Portrait of Union General Marsena R. Patrick posing with his staff officers on the porch of a house in Culpeper, Virginia, November 1863. Patrick served as provost marshal of the Army of the Potomac. By Timothy O'Sullivan. Animated stereoscopic photographs.

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Union Soldiers Posing With Two Mortars in a Fortified Position on Morris Island, South Carolina (1865)

Union soldiers posing with two mortars in a fortified position on Morris Island, South Carolina, 1865. The mortars are said to be aimed at Fort Sumter. By Samuel A. Cooley. Animated stereoscopic photographs.

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Hand-Colored Ambrotype Portraits of an Unidentified Union Officer and His Wife Photographed Before His Leaving to Fight in the Civil War (1861)

Hand-colored ambrotype portraits of an unidentified Union officer and his wife photographed before his leaving to fight in the Civil War, 1861.

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Ambrotype Portrait of a Man Posing With a Steam Engine Built by the Sharps, Davis and Bonsall Company

Ambrotype portrait of a man posing with a steam engine built by the Sharps, Davis and Bonsall Company, c. 1856.

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Union Generals George Meade, John Sedgwick, and Robert O. Tyler Posing With Staff Officers at a Headquarters in Brandy Station, Virginia (1864)

Union generals George Meade, John Sedgwick, and Robert O. Tyler posing with staff officers at a headquarters in Brandy Station, Virginia, February 1864. Animated stereoscopic photographs.

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Three Union Soldiers Posing in the Interior of a Slave Pen During the Civil War in Alexandria, Virginia

Three Union soldiers posing in the interior of a slave pen in Alexandria, Virginia, during the Civil War. Animated stereoscopic photographs.

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View of a Locomotive on the Orange & Alexandria Railroad in Virginia (1862)

View of a locomotive on the Orange & Alexandria Railroad in Virginia, August 1862. By Timothy O'Sullivan. Animated stereoscopic photographs.

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Union Zouaves From Company F of the 4th Michigan Volunteer Infantry Regiment Posing in Front of a Tent During the Civil War

Union Zouaves from Company F of the 4th Michigan Volunteer Infantry Regiment posing in front of a tent in an unidentified camp during the Civil War. Animated stereoscopic photographs.

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Spectators Viewing the Aftermath of a Fire in the Offices of the Daily Morning Call Newspaper in San Francisco, California (1859)

Spectators viewing the aftermath of a fire in the offices of the Daily Morning Call newspaper at the southeast corner of Clay and Montgomery Streets in San Francisco, California, 1859.

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