Chemical warfare dates back thousands of years, but the first large-scale use of chemical weapons was during World War I. Austria-Hungary, France, the German Empire, the United Kingdom, and the United
A French gas attack on German trenches in Flanders, Belgium (1917).
Russian Red Cross nurses tend to gassed Russians brought from the front lines, 1915
British emplacement after German gas attack (probably phosgene)
A bell used as a gas alarm, December 1916.
Chemical warfare
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Chemical warfare involves using the toxic properties of chemical substances as weapons. This type of warfare is distinct from nuclear warfare, biological warfare and radiological warfare, which togeth
John Singer Sargent's iconic World War I painting: Gassed, showing blind casualties on a battlefield after a mustard gas attack
Japanese Special Naval Landing Forces with gas masks and rubber gloves during a chemical attack near Zhabei in the Battle of Shanghai
A Swedish Army soldier wearing a chemical agent protective suit (C-vätskeskydd) and protection mask (skyddsmask 90)
Dispersion of chlorine in World War I