Mustard gas caused burns to the skin but was less fatal than chlorine gas. The British gave mustard gas the nickname ‘HS’. What do these initials stand for?

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Fifteen years before the outbreak of World War I the Hague convention forbade the use of poisonous gases in warfare.  Despite this, chemical weapons were used by both sides during the war.


Mustard gas caused burns to the skin but was less fatal than chlorine gas. The British gave mustard gas the nickname ‘HS’. What do these initials stand for?





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