The images, by an unknown photographer, show daily life of soldiers in the trenches, destruction of towns and military leaders. The year 2014 marks the 100th anniversary of the start of the First World War
An undated archive picture shows French soldiers firing a 155 mm mortar from a trench on the front line, at an unknown location in France.
French soldiers moving a 95 mm cannon, on the rear guard near the front, at an unknown location in France.
a French soldier aiming an anti-aircraft machine gun from a trench at Perthes les Hurlus, eastern France
French soldiers standing in German trenches seized after being shelled on the Somme front, northern France in 1916
French officer standing near a cemetery with recent graves of soldiers killed on the front lines of World War One (WWI), at Saint-Jean-sur-Tourbe on the Champagne front, eastern France December 19, 1916
French General Joseph Joffre (2nd R) congratulating and awarding medals to soldiers, who fought in the Battle of Verdun, in Verdun March 1916
Field Marshal Horatio Herbert Kitchener (2nd L) meeting French General Albert Baratier (R), on horseback, as French Marshal Joseph Joffre looks on (2nd R), on the Champagne front, Eastern France in 1915
Germans soldiers marching through Chalons en Champagne, Eastern France September 1915