French Zouave infantry killed by gas Second Battle of Ypres Belgium 22 April 1915 1929

photograph Landscape by Unknown Date From 1915 To 1915 On 22 April 1915 the Germans released 168 tons of chlorine gas over a four mile front in the first gas attack of the war Initially French and Algerian troops Zouaves of the 45th and 78th Divisions were attacked with the gas inflicting heavy casualties and causing widespread panic with the survivors abandoning their positions Although the Allies initially condemned the attack as barbaric by the end of the war both sides had made extensive use of poison gas