The Great War
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Pl. 37
Select the photograph to enlarge it.Photo: Unknown photographer, Public domain

Plate 37 of 87 · Class V, Gas & protection

Poison gas

The use of toxic chemicals as weapons, first on a large scale in the First World War, when chlorine, phosgene and mustard gas were all used. Estimates run to about 90,000 deaths and 1.3 million casualties, only 3 to 3.5% of the war's total; unlike most weapons, gas could be countered with measures such as gas masks.

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Wikidata Q1466634