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 — A green-yellow chlorine cloud rolls over French colonial troops at Langemarck: the first mass poison-gas attack. By 1918 gas has killed some 90,000 and maimed a million more. Remember what industrial chemistry did here.
READ THIS MOMENT → · SEE IT ON THE WWI MAP → · THE FULL STORY →
THE FREE PRINTABLE STUDY GUIDE
Join the Dispatch — a short welcome series, then a letter when a new atlas opens — and a printable atlas study guide of your choice is yours now, free.
NO TRACKING · YOUR ADDRESS IS USED FOR THE DISPATCH AND NOTHING ELSE · UNSUBSCRIBE ANYTIME