Could there have been a "pause" movement in medieval England opposing such destructive technology? That is the question raised by a striking historical account of what may have been the most formidable siege weapon of the Middle Ages.

Trebuchets reached the peak of their development during the medieval period, and the most famous example is Edward I's massive machine, known as Warwolf. According to Roland Ennos, author of The Powerful Primate: How Controlling Energy Enabled Us to Build Civilization, this terrifying device stood over sixty feet (18 meters) tall and was capable of launching a three-hundred-pound (140-kilogram) stone projectile several hundred yards. It delivered approximately five hundred kilojoules of energy on impact — a thousand times the power of Roman ballistas and five thousand times the force a single human could generate.

Edward I deployed Warwolf on a single occasion, in 1304, during his campaigns of conquest against the Scots. The target was Stirling Castle, the last major stronghold of the Scottish forces. The defenders were reportedly so alarmed by the prospect of the attack that they attempted to surrender before the machine could be put into action. Edward, however, refused to accept their capitulation until he had tested the weapon. Over the course of four days, Warwolf demolished one of the castle's curtain walls. Stirling Castle's capture was part of a broader campaign during the First War of Scottish Independence, a conflict that had intensified after the Scottish victory at the Battle of Stirling Bridge in 1297 and that would eventually see Robert the Bruce crowned King of Scots in 1306.

The Warwolf is widely regarded by military historians as the largest and most powerful trebuchet ever constructed. Trebuchets themselves were counterweight-powered siege engines that superseded earlier tension-based artillery such as the Roman ballista. Unlike their torsion-powered predecessors, trebuchets used a massive counterweight to swing a long throwing arm, dramatically increasing both the range and the payload of the projectiles they could launch. The counterweight trebuchet is believed to have originated in China or the Byzantine world and spread into western Europe by the twelfth century, fundamentally altering the balance between fortifier and besieger; castle designers responded by constructing thicker walls and more sophisticated concentric defenses, as Edward I himself demonstrated in the ring of castles he built across Wales, including Caernarfon and Conwy. Edward I, also known as "Longshanks," reigned from 1272 to 1307 and conducted multiple military campaigns in Scotland, including the First War of Scottish Independence.

Within decades of Warwolf's deployment at Stirling, gunpowder artillery began appearing in European sieges, and trebuchets gradually fell out of military use as cannons could deliver comparable or greater destructive force with less elaborate construction.

The account is drawn from The Powerful Primate: How Controlling Energy Enabled Us to Build Civilization by Roland Ennos.

Source: Marginal Revolution