View of Native Americans Digging an Irrigation Canal On The San Carlos Apache Indian Reservation in Arizona Territory (1886)

View of Native Americans digging an irrigation canal on the San Carlos Apache Indian Reservation in Arizona Territory, 1886.

Source: National Archives and Records Administration.

British Soldiers in and Around a Trench During the Battle of Arras in France (1917)

British soldiers in and around a trench during the Battle of Arras in France, 1917. Smoke from artillery shell explosions can be seen in the distance.

Source.

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.

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.

Source 1.
Source 2.

Japanese Soldiers in a Siege Line Trench During the Siege of Port Arthur (1904)

Japanese soldiers in a siege line trench during the Siege of Port Arthur, c. 1904. Animated stereoview.

Source.

Royal Engineers Digging a Second Line Trench in Flander During World War 1

British soldiers of the Royal Engineers digging a second line trench in Flanders during World War 1. Animated stereoview.