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ORGANISATION FOR THE PROHIBITION OF CHEMICAL WEAPONS Working Together For a World Free of Chemical Weapons Mask Development During WWI

Large scale Use of Gas, Bolimów, Poland May First use of First Use of , Battle Cotton ⁸ of the Frontiers, France Mouth Phenate Hexamine August Helmet Protector ² Hypo Helmet Third Battle of Ieper, Belgium End of WWI ⁹ March July January July November " Large Box also known as the Respiratory Tower " 1915 June 1917

June Gas October 1914 January Helmet ⁴ 1916 Tear Gas Goggles ¹ 1918 April British Gas Casualties, Battle of December February April German ⁶ the Lys, Ieper, Belgium First Use of Gas ⁵, Small Box Ieper Salient, Belgium Respirator Large Scale Use Tear Gas of Battle of Bolimów, Poland

Exercises, Pereyaslav Regiment of Horse and dog April mask s were invent- the Russian Army First use of ed during WWI ⁷ Chlorine Gas ³, Ieper, Belgium

Top row, left to right: US Navy Mark I mask; US Navy Mark II mask; US CE mask; US RFK 1. Tear gas goggles image via Gants militaria, 2. cotton mouth protector via Old Photos, mask; US AT mask; U.S. KT mask; US model 1919 mask. Middle row, left to right: Brit- 3. First use of chlorine gas via Wikipedia (US public domain), 4. Gas helmet via Wikipedia (Creative Commons), ish Black Veil mask; British PH helmet; British BR mask; French M2 mask; French artil- 5. First use of Phosgene Gas lery mask; French ARS mask. Bottom row, left to right: German mask; Russian mask; 6. German Gas Mask via Wikipedia, 7. Dog mask via flicker, @opcw Italian mask; British Motor Corps mask; US Rear Area mask; US Connell mask. 8. First use of Mustard Gas via Wikipedia (U.S. federal government), /opcwonline /opcwonline /company/opcw 9. End of via Wikipedia (Australian public domain, Creative Commons). @opcw_st