THE DAY IN HISTORY · APRIL 22
April 22 in history
What happened on April 22: 1 moment from the Maps of History atlases, in 1915, each linked to the map that shows it.
— Chlorine gas attack at Ypres
22 Apr 1915 — At Langemarck, a green-yellow cloud of chlorine rolls over French colonial troops in the first mass poison-gas attack. By 1918 gas has killed some 90,000 people and maimed a million more. Remember what industrial chemistry did here.
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