Chemical Warfare: an Introduction to Mustard Gas | Chemically Speaking: the Structure of Mustard Gas | By Any other Name: Origins of Mustard Gas | In Flander’s Field: Mustard Gas Affects History | Agent of War to Anti-Cancer Drug: History Affects Mustard Gas | Taking the Next Step: More Sources on Mustard Gas
By the end of World War I, chemical weapons, mustard gas in particular, had killed a total of 33,000 men and injured up to 690,000.