American troops going forward to the battle line in the Forest of Argonne, France. September 26, 191…

Canadian Tank at the Western front after battle, France 1918.

U.S. Troops of the 35th Coast Artillery loading a mobile railroad gun, 13.9 inches caliber, on the A…

Battery C, 6th Field Artillery fired the first shot for America on the Lorraine front. A shell case …

Artillery position with heavy guns and ammunition shells near the Western Front.

British guns elevated position mobile mount at the German front.

British heavy gun in action firing at the Western front.

Soldiers from the 5e Canadian regiment cavalry return from the Western front on top of tank, France …

Canadian tank and soldiers move into enemy lines in the "Battle of Vimy Ridge" was one of the openin…

French "37" in firing position on parapet in second-line trench. This gun has a maximum range over o…

Night firing of a French 320mm rail gun during a night bombardment at the German front line.

Discharge of a huge French cannon caught by the camera just as the projectile left for the German li…

Tank ploughing its way through a trench and starting toward the German line near Saint Michel, Franc…

German soldiers standing around a German tank as other soldiers work on it.

The skipper and gunner of a "whippet" tank, with the hatches open. Americans northwest of Verdun, Fr…

Front view of the two-man tank manufactured by the Ford Motor Company, 1918.