22 abr 1915 ano - Chemical weapon
Descrição:
The first full-scale deployment of deadly chemical warfare agents during World War I was at the Second Battle of Ypres, on April 22, 1915, when the Germans attacked French, Canadian and Algerian troops with chlorine gas.
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https://winstonchurchill.hillsdale.edu/wp-content/uploads/2015/10/Churchill-and-Chemical-Warfare-840x430.jpg
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