WORLD WAR I: TRENCH DIGGING.
WORLD WAR I: SOMME.
WORLD WAR I: TRENCH, 1918.
WORLD WAR I: TRENCH.
WORLD WAR I: BRITISH TANK.
WWI: BATTLE OF ARRAS, 1917.
WORLD WAR I: TRENCH HUTS.
WORLD WAR I: GERMAN TRENCH.
WORLD WAR I: TRENCH, c1916.
WORLD WAR I: TRENCH, c1917.
WORLD WAR I: BATTLE.
WORLD WAR I: TANK TRAP.
WORLD WAR I.
WORLD WAR I: FORTIFICATION.
WORLD WAR I: TRENCHES.
WORLD WAR I: GUNNERS.
WWI: FRENCH LINE OF DEFENSE.
WORLD WAR I: GAS WARFARE.
WORLD WAR I: FRENCH FORT.
WORLD WAR I: AERIAL PHOTO.
WORLD WAR I: FRENCH DUGOUT.
WORLD WAR I: TELEPHONE.
WORLD WAR I: CANNON.
WORLD WAR I: CAMOUFLAGE.
WORLD WAR I: BRITISH GUN.
WORLD WAR I: SOMME, 1916.
WORLD WAR I: CANADIANS.
BATTLE OF THE SOMME, 1916.
WWI: TRENCHES, c1915.
WORLD WAR I: TRENCH MORTAR.
WORLD WAR I: ARTILLERY.
WORLD WAR I: GERMAN GUN.
WORLD WAR I: ARGONNE, 1918.
WORLD WAR I: FRENCH TROOPS.
WORLD WAR I: GERMAN GUNS.
WORLD WAR I: ARMED BARGE.
WORLD WAR I: OBSERVATION.
WORLD WAR I: GALLIPOLI.
WORLD WAR I: BATTLEFIELD.
WORLD WAR I: ANTI-AIRCRAFT.
WORLD WAR I: PILL BOX FORT.
WORLD WAR I: SPIKED BOARDS.
WORLD WAR I: AMERICANS.
WORLD WAR I: FLAMETHROWER.
WWI: SOMME, c1916.
WWI: TRENCH MORTAR.
WORLD WAR I: SOMME FRONT.
WORLD WAR I: FRENCH TRENCH.
Destroyed French town, World War I
WORLD WAR I: TRENCH, c1914.
WORLD WAR I: BELGIUM.
WORLD WAR I: RELAXATION.
WORLD WAR I: ARMORED CARS.
WORLD WAR I: BUNKER.
WORLD WAR I: FRENCH TANK.
WWI: AMERICAN TROOPS.
WWI: FRANCE, c1916.
WWI: SERBIAN TRENCH.
WORLD WAR I: FRANCE.
WWI: FRANCE, c1918.
WORLD WAR I: RIFLE GRENADES.
WORLD WAR I: TERNOPIL.
WORLD WAR I: SEARCHLIGHT.
WORLD WAR I: FLANDERS.
WORLD WAR I: PRISONERS.
WORLD WAR I: GUNNERS, 1918.
WORLD WAR I: VIMY RIDGE.
WORLD WAR I: PONTOON BRIDGE.
WORLD WAR I: BALLOON.
WORLD WAR I: DAMAGED PLANE.
WWI: MOHAWK TROOPS.
WWI: BRITISH WOUNDED.
WORLD WAR I: LOUNGE, c1917.
WORLD WAR I: GERMAN DEAD.
WORLD WAR I: SERBIA.
WWI: BATTLEFIELD, c1916.
WWI: AMERICANS, 1918.
WORLD WAR I: U.S. TROOPS.
WWI: SOLDIERS, c1914.
WORLD WAR I: BOURESCHES
Men of the 23rd US Infantry, in France.
WWI: GERMAN PILOTS.
WORLD WAR I: BELGIUM, 1918.
WORLD WAR I: WESTERN FRONT.
WORLD WAR I: FRENCH TANKS.
WORLD WAR I: FRENCH RUINS.
WORLD WAR I: AMERICAN FRONT.
WWI: HOSPITAL BOMBING.
WORLD WAR I: BRITISH TANKS.
WORLD WAR I: CAMBRAI, 1917.
WWI: TRENCHES, c1914.
British soldiers attacking a German Trench on the Western Front, in World War One.
WORLD WAR I: MESSENGER DOG.
WWI: AUSTRIAN TRENCH.
WWI: ITALY, c1916.
WWI: CRAONNE, c1914.
WORLD WAR I: TRENCH, c1915.
WORLD WAR I: HORSES.
WORLD WAR I: FRANCE, c1918.
WORLD WAR I: MACHINE GUN.
WORLD WAR I: BATTLEFIELD
WORLD WAR I: FRANCE, 1918.
WORLD WAR I: QUARRY.
WORLD WAR I: SPAHIS.
WORLD WAR I: BARBED WIRE.
WWI: MILITARY POLICE, 1918.
WORLD WAR I: SALVAGING
WORLD WAR I: GERMANY, c1918.
WORLD WAR I: DOBERDO.
The Battle of Loos.
French officers in an underground HQ.
WORLD WAR I: CANNON, 1915. Turkish soldiers equipping a cannon with desert tires, during World War I. Photograph from the Berliner Illustrirte Zeitung, 14 March 1915.
WWI: PRISONERS OF WAR.
WORLD WAR I: GERMAN DUGOUT.
WWI: YPRES, c1916.
WWI: RUSSIAN BATTERY.
WORLD WAR I: CANAL DU NORD.
WORLD WAR I: GERMAN TROOPS.
British soldiers pass through a link trench.
WORLD WAR I: CAMP UPTON.
WORLD WAR I: TRAINING.
WORLD WAR I: VOSGES.
WWI: TRENCHES, c1916.
Telephone Lorry Exchange.
WORLD WAR I: INDIAN TROOPS.
RUSSO-JAPANESE WAR, c1905.
WORLD WAR I: VERDUN.
WORLD WAR I : VERDUN
WORLD WAR I: ALLIED PATROL.
WWI: FRENCH TANK, 1918.
WORLD WAR I: ZEPPELIN.
WORLD WAR I: SOLDIERS.
WORLD WAR I: GERMAN PLANES.
WORLD WAR I: TANKS.
WWI: BELGIAN GUNNER.
WWI: BRITISH ARMY/SOMME.