| 4.22 | |
| The German army uses poison gas in the battlefield for the first time (1915) | |
Copyright Masaru HASHIMOTO
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| CHEMICAL WEAPONS This new weapon spread to the enemy soon after its development. Adolph Hitler, who was a soldier in the First World War, was severly wounded and nearly lost his eyesight in a gas attack. Three decades later, he used gas to kill 6 million Jews. | |