baïonnette

Bayonet derives from French baïonnette, and the word has long been attributed to the city of Bayonne in the Basque Country of southwestern France. The most popular etymology holds that the bayonet was invented or first manufactured in Bayonne in the early seventeenth century, a knife that could be plugged into the muzzle of a musket to convert the firearm into a spear when the soldier had no time to reload. Bayonne had a long tradition of knife-making — its cutlers were renowned throughout France — and the city's name attached firmly to the weapon. A rival etymology, promoted by some scholars, suggests that Bayonne was merely the city through which early bayonets were commercially distributed, making it a point of sale rather than a point of manufacture. Whether the weapon was made in Bayonne or merely passed through it, the city's name traveled with the blade.

The military implications of the plug bayonet — and its successor, the socket bayonet that fitted around the barrel rather than inside it — were immense. Before the bayonet's widespread adoption in the late seventeenth century, infantry formations typically mixed musketeers (who fired but could not fight hand-to-hand while reloading) with pikemen (who protected the musketeers from cavalry charges with long pikes). The bayonet made every musketeer his own pikeman. When the musket was empty, the soldier fixed his bayonet and became a spear-carrier. The pike, a weapon with roots in ancient Greece, became obsolete almost overnight. Armies reorganized from mixed pike-and-shot formations into uniform musketeer formations, simplifying supply chains, training, and tactical doctrine.

The socket bayonet, developed around 1700 and adopted by European armies in the early eighteenth century, fitted over the muzzle rather than into it, allowing the weapon to remain loaded while the bayonet was fixed. This was the decisive innovation: a soldier with a socket bayonet could fire and then charge without pausing to unfix his blade. The bayonet charge became a standard tactical maneuver and an instrument of psychological warfare — the sight of a formed line advancing with fixed bayonets was designed to break enemy morale before contact. At the Battle of Prestonpans in 1745, Highland Scots charged the British line with broadswords and routed it before the bayonets could be brought to bear. The weapon's psychological power was real but not unlimited.

Bayonets survived into the twentieth century long after the conditions that made them tactically central had passed. In both World Wars, soldiers carried bayonets and occasionally used them in trench fighting, but the industrial weapons of twentieth-century warfare — machine guns, artillery, aircraft, poison gas — rendered the bayonet charge suicidal in open ground. They persisted for practical reasons (as utility knives, entrenching tools, wire-cutters) and ceremonial ones (bayonets remain part of military dress uniforms and parade-ground drill across the world). The knife from Bayonne, or distributed through Bayonne, has become more symbol than instrument — the ancient gesture of converting a shooting weapon into a stabbing one, preserved in metal and tradition long after the tactical rationale has dissolved.