Ancient Persians were the first to use chemical warfare when they gassed Roman soldiers with toxic fumes 2,000 years ago, researchers found.
Archaeologists studied the bodies of 20 Roman soldiers found in Syria 70 years ago and Dr Simon James, a researcher at the University of Leicester, solved the mystery of their death.
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Source and full report:
Science Daily
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Source: Independent, 15.01.09, page 17
Independent - online report
Wikipedia: Dura-Europos