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Official start and end dates of the war.
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People assume that the Germans were the first to use gas as a weapon, but the French started it in 1914, with a bromide based tear gas.
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The Germans introduce chlorine gas in the battle of Ypres and they pepper the French lines with the gas, it is very effective.
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The British train 1,400 men to setup a return gas attack against the Germans. They banned the word "gas" and anyone caught saying it was severly punished.
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The introduction of mustard gas is what hit the troops the hardest. It was extremely potent, lasting for weeks and created blisters that grew inside and out. Extremely painful and slow death,
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By the time, efficent filters were put into the gas masks, the war was already over.
