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Trench Warfare
Trench warfare is a type of land warfare using occupied fighting lines consisting largely of military trenches. -
Gas mask
Gas masks used in World War One were made as a result of poison gas attacks that took the Allies in the trenches on the Western Front by surprise. -
Mustard Gas
Toxic war gas with sulfide based compounds that raises blisters and attacks the eyes and lungs. -
Zimmermann Telegram
The Zimmermann Telegram was a secret diplomatic communication issued from the German Foreign Office in January 1917 that proposed a military alliance between Germany and Mexico.