Map of a Russian Redoubt at the Start of World War 1 (1914)

Map of a Russian redoubt at the start of World War 1. From The Illustrated War News magazine published in 1914.

Map of French Forts Surrounding Paris Published Near The Start of World War 1 in September 1914

Map of French forts surrounding Paris published near the start of World War 1 in September 1914. From The Illustrated War News magazine published in 1914.

“German Winter Watch in the Vosges. Firing a Heavy Howitzer.“ German Soldiers in the Vosges Mountains of France During World War 1 (1910's)

“German winter watch in the Vosges. Firing a heavy howitzer.“ German soldiers in the Vosges Mountains of France during World War 1.

Source: National Archives and Records Administration.

Portrait of Two Men Wearing Civilian Clothing Posing in Fort Beauregard in Manassas, Virginia, During the American Civil War (1860’s)

Portrait of two men wearing civilian clothing posing in Fort Beauregard in Manassas, Virginia, during the American Civil War, c. 1860’s. Attributed to Mathew Brady.

Source: National Archives and Records Administration.

View of Buildings Razed by Union Troops in Baton Rouge, Louisiana, Shortly After the Battle of Baton Rouge (1862)

View of buildings razed by Union troops in Baton Rouge, Louisiana, shortly after the Battle of Baton Rouge, 1862. A defensive stockade built by the Union garrison is visible in the background. By Andrew Lytle. From Miller's Photographic History of the Civil War.

Three American Soldiers Examining a Captured German Pillbox in the Blanc Mont Sector of Champagne, France (1910's)

Three American soldiers examining a captured German pillbox in the Blanc Mont sector of Champagne, France. Possibly taken after World War 1 had ended. Published by Keystone View Company.

Source.

Daguerreotype View of Fort Howard From Across the Fox River in Green Bay, Wisconsin (1851)

Daguerreotype view of Fort Howard from across the Fox River in Green Bay, Wisconsin, 1851. The officer standing on the wharf is identified as a Major Haller.

Source.

Daguerreotype View of People Watching a Ship Departing the Port of Le Havre, France (1851)

Daguerreotype view of people watching a ship departing the port of Le Havre, France, 1851. By Louis-Cyrus Macaire.

Source.

Two Photographs of Union Soldiers Posing With a Captured Confederate 18-Pounder Cannon Nicknamed “Whistling Dick” (1863)

Two photographs of Union soldiers posing with a captured Confederate 18-pounder cannon nicknamed “Whistling Dick.” The gun was responsible for sinking the Union gunboat USS Cincinnati during the Siege of Vicksburg on May 26, 1863.

Source.
Second image from Miller's Photographic History of the Civil War.

Union Soldiers Building Fortifications in a Street in Decatur, Alabama (1864)

Union soldiers building fortifications in a street in Decatur, Alabama, 1864. Image from Miller's Photographic History of the Civil War.

Union Soldiers of the 48th New York Volunteer Infantry Regiment Standing at Attention in the Interior of Fort Pulaski on Cockspur Island Near Savannah, Georgia (1863)

Union soldiers of the 48th New York Volunteer Infantry Regiment standing at attention in the interior of Fort Pulaski on Cockspur Island near Savannah, Georgia, 1863.

Source.

Union Soldiers Posing With Two Cannon in the Lower Battery Which Protected Chain Bridge in Washington, D.C. (1861)

Union soldiers posing with two cannon in the lower battery which protected Chain Bridge in Washington, D.C., 1861.

Source.

A Union Soldier Posing in the Barrel of a Cannon at Battery Rodgers in Arlington, Virginia, During the Civil War

A Union soldier posing in the barrel of a cannon at Battery Rodgers in Arlington, Virginia, during the Civil War.

Source.

Time-Lapse View of Union Soldiers Posing With the Wreckage of the Swamp Angel on Morris Island, South Carolina (1863)

Close-up view of the barrel of the 8-inch Parrot gun and the Union soldiers playing cards,

Time-lapse view of Union soldiers posing with the wreckage of the Swamp Angel, a gun emplacement for an 8-inch Parrot gun which was built in swampland on Morris Island, 1863. It fired incendiary shells into downtown Charleston, a distant 4.5 miles away, until it burst during its 36th shot on August 23, 1863. Two of the soldiers near the barrel of the Parrot gun are playing a card game. By Haas and Peale.

Source 1.
Source 2.
More information.

Two Views of Union Soldiers and Civilians Posing on Confederate Fortifications in Fort Mahone Two Days After Its Capture During the Siege of Petersburg (1865)

Two views of Union soldiers and civilians posing on Confederate fortifications in Fort Mahone two days after its capture during the Siege of Petersburg, April 3, 1865. Animated stereoscopic photographs.

Source 1.
Source 2.

Union Soldiers Posing in the Interior of Fort Totten During the Civil War in Washington, D.C. (1865)

Union soldiers posing in the interior of Fort Totten during the Civil War in Washington, D.C., c. 1865. Animated stereoscopic photographs.

Source.

Union Soldiers Posing Reloading an Artillery Piece in Fort Woodbury in Arlington, Virginia, During the Civil War

Union soldiers posing reloading an artillery piece in Fort Woodbury in Arlington, Virginia, during the Civil War. Animated stereoscopic photographs.

Source.

Union Soldiers Drilling in Square Formation During the Civil War at Fort Wayne in Detroit, Michigan

Union soldiers drilling in square formation during the Civil War at Fort Wayne in Detroit, Michigan.

Three Men Posing With Two Mortars in the Trapier Mortar Battery on Morris Island Shortly After the Surrender of the Nearby Fort Sumter by Union Forces in Charleston Harbor (1861)

Three men posing with two mortars in the Trapier Mortar Battery on Morris Island shortly after the surrender of the nearby Fort Sumter by Union forces in Charleston Harbor, 1861. The battery fired its mortars at Fort Sumter in the bombardment leading to its surrender. The darkroom used by the photographers to develop this photograph is visible behind the mortar in the background. By Osborn and Durbec. From The Blue and Gray in Black and White: A History of Civil War Photography.

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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