Chemical warfare in Roman times

It was a very bad day for 3rd century Roman soldiers who tried to defend a fortress by way of a cramped tunnel. Dead soldiers were doused with toxic substances and set on fire, causing the Romans to retreat.

The attack came from Persians of the Sasanian culture. “In my view, this is the earliest archaeological evidence for the use of chemical warfare, which was later used by the ancient Greeks,” said Simon James of the University of Leicester in England.