Chlorine · The Arsenal · The Great War Chronicle

IWM Caption: Aerial photograph of a British gas attack in progress between Carnoy and Montauban, shortly before the Somme offensive . — Select the photograph to enlarge it.Photo: British Government, Public domain

Plate 33 of 87 · Class V, Gas & protection

A choking gas that attacks the lungs, used by Germany in the first large-scale gas attack, at Ypres on 22 April 1915. Soon countered by crude masks and then proper respirators, it was replaced by more deadly agents.

Mentioned in

Chapter IV Deadlock Overview §2 The Western Front: From Neuve Chapelle to Loos §3 Second Ypres and the First Gas Attack
Chapter X The Machinery of War Overview §3 Poison Gas: The Fear and the Figures