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second battle of Ypres. Germany's first use of poison gas (12h 40min, apr 22, 1915 y – 21h 21min, may 25, 1915 y)

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WWI / booming 20's / WWII

25 Jan 2018

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12h 40min, apr 22, 1915 y

21h 21min, may 25, 1915 y

~ 1 months and 3 days

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