Survivors: Soldiers of the original British Expeditionary Force return from the bloody battle of Loos in September 1915. Loos was the last in a series of failed British attacks that effectively destroyed the BEF and led to the firing of its commander, Sir John French, and the hiring of his successor, Sir Douglas Haig, who kept the job for the rest of the war despite being accused of senselessly sending millions of men to their deaths
Zouaves they are hit by chlorine gas during the Second Battle of Ypres, Belgium, April 22, 1915. Initially the French and Algerian troops (Zouaves) divisions 45th and 78th were attacked with gas, causing heavy casualties and causing widespread panic some survivors abandon their positions. Although initially the Allies condemned the attack as barbaric, towards the end of the war the two sides had made extensive use of poisonous gas.