Chooeubhaokhaossian the Great's Temple of History

A group of Union officers, scouts, and agents including head of Union intelligence operations, Allan Pinkerton, posing in front of a tent on the Antietam battlefield near Sharpsburg, Maryland, October 1862.

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President Abraham Lincoln meeting with Union General George McClellan in the general's tent on the Antietam battlefield near Sharpsburg, Maryland, October 3, 1862. A captured Confederate flag lies on the ground on the far left underneath the American flag on the table. By Alexander Gardner. Animated stereoscopic photograph (fixed).

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Portrait of Union intelligence chief Allan Pinkerton (sitting on left) and four other unidentified men posing in front of a tent on the Antietam battlefield shortly after the battle there near Sharpsburg, Maryland, September 1862. By Alexander Gardner. Animated stereoscopic photographs.

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Union General John C. Caldwell and his staff posing in front of a tent on the Antietam battlefield shortly after the battle there, September 1862. By Alexander Gardner. Animated stereoscopic photographs.

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