Although debated as coming from “Greek” origins, the process known as “Greek Fire” may have originated with Byzantine Engineer, Callimachus. Considered a “Naval” weapon, it was a highly combustible mixture of Petroleum, Sulphur, Saltpetre and unburnt Quicklime. The substance was either a powder (or liquid form) – depending on the need. When the substance was ignited by flame (or impact), the resulting flames could NOT be extinguished by water!. In fact, water makes Greek Fire burn MORE! This “fact” made it possible to literally “set fire” to The Sea. First attempted (successfully) at The Siege of Constantinople (674-678 A.D.), Greek Fire was adopted into everything from Hand Grenades to primitive “flame throwing” devices. It was a staple for use with Catapults in The Byzantine Army.