Greek fire
Noun
Meaning
a mixture used by Byzantine Greeks that was often shot at adversaries; catches fire when wetted
Source: WordNetSynonyms
Hypernyms
Examples
Another invention in the late Middle Ages was the use of Greek fire by the Byzantines, which was used to set enemy fleets on fire.
Illumination from the Poliorcetica of Hero of Byzantium The chief method of deployment of Greek fire, which sets it apart from similar substances, was its projection through a tube (siphōn), for use aboard ships or in sieges.
History further Incendiary and flaming weapons were used in warfare for centuries prior to the invention of Greek fire.
Despite this almost exclusive focus, however, Greek fire is best understood as a complete weapon system of many components, all of which were needed to operate together to render it effective.
So strict was the secrecy that the composition of Greek fire was lost forever and remains a source of speculation.sfn Consequently, the "mystery" of the formula has long dominated the research into Greek fire.
Their method: Greek fire.