The generally accepted history of the catapult holds that it was first invented in the Greek city-state of Syracuse on the island of Sicily in 399 BC. The Syracusan general Dionysius I had led a military coup in 405 BC that overthrew Syracuse”s democratically elected government and installed himself as a dictator. His first acts as dictator were to put Syracuse’s society and economy on a war footing. Dionysius planned to go to war with Carthage, who controlled the western half of Sicily, and seize total control of the island.
In order to do this, the Syracusans sought new weapons. Dionysius brought in engineers from around the Greek world to work on new technology. The Greeks in Italy had previously invented an early crossbow called the gastraphetes, which had superior range to a manually drawn bow. Dionysius’ engineers took this a step further and created arrow and stone-throwing machines to be used in assaulting Carthaginian fortifications.
These early catapults developed into the double-armed torsion catapults used all over the ancient Mediterranean world (the Chinese developed catapults independently at around the same time). They were used by the Romans, Greeks, Carthaginians, Macedonians and all the Hellenistic kingdoms. Some catapults grew to very large sizes and packed enormous destructive power.
Yet, there are indications here and there that the Syracusans were not the first to come up with the idea of using levers, springs and torque to fling boulders at their enemies. Several vague clues from ancient writers indicate that the idea of the catapult might have a more eastern origin.
The first comes from the Biblical book of Chronicles’ record of the reign of King Uzziah of Judah. Uzziah reigned for 52 years in the mid 8th century BC. During his reign Judah undertook a large-scale military buildup, including improving the fortifications of Jerusalem. As part of the fortifications, he “made devices invented for use on the towers and on the corner defenses so that soldiers could shoot arrows and hurl large stones from the walls.”