Mardi bin Ali al-Tarsusi

Al-Tarsusi wrote a military manual for Salah al-Din titled “Instruction of the Masters on the Means of Deliverance in Wars from Disaster, and the Unfurling of the Banners of Information: On Equipment and Engines which aid in Encounters with Enemies.” In it we find the first clearly written record of a counterweight trebuchet. The manual also records using “naft” (a petroleum-based resin and sulfur, similar to Greek fire), which al-Tarsusi suggests can be placed inside blown eggshells and thrown from horseback.

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