Ancient Chemical Warfare

Archaeological Finds that are Still Baffling Researchers

When in 1933 an archeologist was conducting an excavation underneath a Roman/Persian battlefield, he stumbled across something that he had no idea could exist. The Persians when they came across the fact that Romans were digging a tunnel beneath them, came up with a counter-tunnel of their own and filled them with burning sulfur and bitumen, which turns into acid in your lungs when you inhale it.