The soldiers who were struck by the gas attack in this passage experienced sudden death.
What were the effects of a gas attack?
The minimal immediate effects are lachrymatory. However, subsequently, it causes a build-up of fluid in the lungs (pulmonary edema), leading to death. It is estimated that as many as 85% of the 91,000 gas deaths in World War 1 were a result of phosgene or the related agent, diphosgene (trichloromethane chloroformate).
What is a gas attack in World War 1?
The first significant gas attack occurred at Ypres in April 1915, when the Germans released clouds of poisonous chlorine. The gas inflicted significant casualties among the British and Canadian forces at Ypres and caused widespread panic and confusion amongst the French colonial troops.
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