The attached is a black and white diagram depicting five different German gas artillery shells that were manufactured to be fired from a number of different guns of varying calibers.
In retaliation for a 1914 French tear-gas grenade attack at Neuve Chapelle, the German Army, on April 22, 1915, hurled 520 gas shells at British and Canadian units in Belgium, killing five thousand and incapacitating ten thousand more.
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