Germans in their well protected trenches on the Belgian frontier showing the men in the act of aimin…

Canadian troops going "over the top" during training near St. Pol, France. October 1916. Lt. Ivor Ca…

American soldiers on the Piave front hurling a shower of hand grenades into the Austrian trenches. V…

Balloon ascending at Camp de Meucon, France, 1918.

British balloon observer ready to make an ascension in Mesopotamia. Practically all the members of t…

Troops hold the railway line at Ypres Salient area in Merville, France. April 11, 1918.

Gun crew from Regimental Headquarters Company, 23rd Infantry, firing 37mm gun during an advance agai…

British guns elevated position mobile mount at the German front.

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

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

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

Men entering a novel billet with their packs near Riencourt, France. 1918.

American soldier and his horse wearing gas masks at the front line, France, 1917.

French sergeant and a dog both wearing gas masks on the front line, France 1917.

Three British soldiers in trench under fire by the Germans.

American soldiers answering the bugle call to charge "Over the top"

French soldiers in trenches, 1917.

German pill box taken during the advance of the 69th Division near Meuse, France. 1918.

German soldiers in a trench firing at French troops.

German military personnal in a trench, France.

German soldiers on horseback view the scene of British trench which was captured by the Germans.

German soldiers in a trench. France, 1917.

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

French soldiers using liquid fire, early "Flamethrowers" at the front line trenches, France 1917.…