33. The Medieval Napalm That Saved the Byzantine Empire

In the 670s, the Byzantines developed Greek Fire, an incendiary weapon to set enemy ships ablaze. Stored in a container and pumped out at high pressure through a nozzle, the weapon was a medieval flamethrower that directed a stream of fire at opposing ships’ wooden hulls. Like napalm, the incendiary produced an intense fire that burned on almost any surface, including water. That made it highly effective in naval warfare.

Some limitations kept Greek Fire from revolutionizing warfare like gunpowder would centuries later. It had a short effective range, of about only thirty feet, so ships had to be very close. Conditions also had to be ideal: strong winds would make targeting impossible, and so would rough seas. However, when ideal conditions of no wind and calm seas were met, Greek Fire was devastating. That happened during the 717-718 Arab Siege of Constantinople when a naval assault was annihilated by Greek Fire in a close-range sea battle that saved the city.



