Mustard Gas in World War I - Mustard Gas in World War I | HowStuffWorks

Mustard Gas in World War I - Mustard Gas in World War I | HowStuffWorks

Mustard Gas in World War I - Mustard gas in World War I became a way to break the deadlock of trench warfare. Find out how mustard gas in World War I worked and who used it.

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1915 poisoning
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