Serbian reserves in the Balkan mountains awaiting orders to advance

Serbian cavalry ready for battle on the Balkan plains

Great naval gun and its protecting fort of sand bags on the Saloniki front

British anti-aircraft gun in action on Balkan front, camouflaged and mounted on auto

In a British first line trench in the Balkans

No man's land, sea of barbed wire in front of Bulgarian lines, Saloniki front

Rifle grenade in a British line trench in the Balkans

Serbian trench. Awaiting phone call from listening post to fire rocket for illuminating "No man's land"

Loading a trench mortar in a hillside dugout on the Serbian front

French colonial (Morocco) cavalry in Paris

Where Hell was loosed; war's indescribable desolation and unburied victims, Lens

No man's land near Lens, France

A family in their ruined house, Lens

Temporary homes in devastated Lens, long occupied by the Germans, France

Proud men of the north who fought on Flander's fields

"Down in the shell crater, we fought like Kilkenny cats," Battle of Cambrai

Steel-helmeted Scots entrenched and cheerily awaiting a counterattack

Turks eager for war. Germany's most distant ally mobilizing her army

Historic first landing of allied troops at Dardanelles

West Beach, Gallipoli. Scene of British landing and of terrible battles

Marshal Haig and General Antoine at review of French First Division

Ypres Cathedral in ruins, British lory in foreground

Shell bursting in the Grand Place, Ypres, Belgium

Trenches bitterly contested in battle in once peaceful village near Ypres

Creeping on the enemy over the sand dunes, British contingent in Belgium

British Royal Engineers constructing second line trenches in Flanders

"And the trench was a reeking shambles," German dead in the La Bassée area

Strong concrete German position and victims after Battle of Menin Road

British soldiers gleaning in the fields of war, Menin Road

A bristling forest of bayonets, Russian troops on review