Greek Fire

The greatest secret weapon of Eastern Roman Empire was Greek Fire, a ship born terror weapon that ignited on contact and burned on water. Fired from a brass tube, the flaming liquid was as devastating to morale as it was to the wooden ships of the era. It is thought to have been invented by a Jewish Syrian Engineer named Callinicus (Kallinikos) in the mid 7th century. To keep it from enemy hands, the secret formula was known to a very small number of people (around three). This is also the reason the formula is unknown today for by the mid 13th century, some tragic event killed all those with the knowledge before it could be passed on.