Bayonets

Edged Weapons — Subcategory

Overview

The bayonet is a bladed weapon designed to attach to the muzzle or barrel of a firearm, converting it into a spear or pike for close-quarters combat. Introduced in the late 17th century, the bayonet solved the critical tactical problem of the muzzle-loading era: a musketeer who had fired and not yet reloaded was defenseless against a cavalry charge or infantry assault. By making every musketeer also a pikeman, the bayonet made the separate pike unit obsolete.

Development

Plug Bayonet (c. 1640–1690)

The first bayonet form — a blade with a tapered wooden handle that was inserted directly into the musket's muzzle:

• Converted the musket into a short spear
• Fatal flaw — The musket could not be fired with the bayonet inserted; the soldier had to choose between firearm and close-combat weapon
• Used notably at the Battle of Killiecrankie (1689), where Highlanders charged before the government troops could fix bayonets — producing a massacre

Socket Bayonet (c. 1687–1800s)

The solution: a tubular sleeve (socket) that slipped over the muzzle and locked with an L-shaped slot onto a lug:

• The musket could be fired with the bayonet fixed
• Replaced both plug bayonet and the separate pike
• The French socket bayonet (standardized under Vauban, late 1680s) spread rapidly across European armies
• Form: typically triangular or cruciform cross-section; 35–50 cm blade; the triangular cross-section created wounds difficult for surgeons to close

Sword Bayonet (1800s onward)

As rifles replaced muskets, longer bayonets that could also serve as short swords became common:

• Flat, single or double-edged blade; 35–65 cm
• The British Pattern 1796 and subsequent patterns; the American M1905; the German Seitengewehr
• Could be carried separately and used as a fighting knife

Spike Bayonet (20th century)

• The spike bayonet — a simple rod with a point — returned in the 20th century
• British No. 4 Spike Bayonet (WWII) and later patterns
• Cheap; lightweight; effective; no utility function as a knife

Modern Bayonets

• M7 Bayonet (M16) — Standard US bayonet; 6.75-inch blade; also serves as utility knife
• M9 Bayonet — Multi-purpose; serrated spine; combines with scabbard as a wire cutter
• Modern bayonets are primarily utility tools; bayonet charges are rare but have occurred as recently as the Falklands War (1982), Iraq, and Afghanistan

Tactical Role

The bayonet's primary military value shifted over time:

• 17th–19th century — Essential; bayonet charges decided many battles; the sound of "Fix bayonets!" was an order to prepare a direct assault
• WWI — Emphasized in training; actual bayonet casualties relatively rare (artillery, machine guns, gas dominated); trench raiding used clubs, knives, and entrenching tools more than bayonets
• WWII onward — Primarily psychological and last-resort; the threat of the bayonet charge remained tactically useful even if charges were infrequent
• Modern — Utility knife function has overtaken combat function; most armies retain bayonets for tradition and last-resort

This article is a stub. Contributions covering specific bayonet patterns, battles, and military doctrine are welcome.