arcuballista

Latin arcus meant a bow or arch; ballista was a siege engine that hurled projectiles. The arcuballista — bow-ballista — combined the handheld bow's portability with the ballista's mechanical power. Medieval Latin records from the 10th century describe crossbows; the weapon appears in Chinese records much earlier, perhaps as early as the 5th century BCE. The horizontal stock, the trigger mechanism, and the short, powerful prod distinguished it from the longbow.

The Second Lateran Council of 1139 decreed that the crossbow was too lethal to be used by Christians against Christians — though its use against Muslims and heathens was explicitly permitted. The decree was largely ignored but reveals how the weapon was perceived: a disruptive technology that gave untrained peasants the ability to kill knights. A three-year training requirement produced a skilled longbowman; a crossbowman could be combat-ready in weeks.

The Battle of Crécy (1346) demonstrated the English longbow's tactical superiority over Genoese crossbowmen in French employ, partly because the longbow's rate of fire was much higher. But the crossbow remained dominant in continental warfare and in siege contexts. The Swiss and German crossbowmen of the 14th and 15th centuries were elite mercenary troops.

The crossbow fell from military use in the late 16th century as firearms became practical, but survived in hunting for centuries. Today it is a sport and hunting weapon, with ranges of up to 460 meters for modern compound crossbows. The arcuballista's trigger mechanism — one of medieval engineering's elegant solutions — is unchanged.