When did chemical warfare first start?
by 
Jenny The Great ⭐
ANSWERS: 2
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The earliest archaeological evidence of gas warfare is during the Roman–Persian wars. Research carried out on the collapsed tunnels at Dura-Europos in Syria suggests that during the siege of the town in the third century AD, the Sassanians used bitumen and sulfur crystals to get it burning.
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Pre-history for sure. Biological warfare, too. Ancient people used to catapult dead livestock over the walls of besieged cities in order to promote disease and just generally be gross.
Linda Joy 
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