Fairbairn–Sykes fighting knife
The Fairbairn–Sykes fighting knife is a double-edged fighting knife resembling a dagger or poignard with a foil grip. It was developed by William Ewart Fairbairn and Eric Anthony Sykes in Shanghai based on ideas that the two men had while serving on the Shanghai Municipal Police in China before World War II.
F-S fighting knife – ring grip pattern
Fairbairn–Sykes fighting knife at Fort William Museum
OSS knife and its distinctive scabbard (Collection of the CIA Museum)
Member of the Cambodian 911 ParaCommando on USS Essex with a F-S commando dagger on his webbing belt.
A fighting knife has a blade designed to most effectively inflict injury in close-quarters physical confrontations. The combat knife and the trench knife are examples of military fighting knives.
An assortment of fighting knives
Top: Bowie Knife c. 1850s Bottom: Naval Bowie Knife c. 1860s
M1918 Trench Knife
U.S. Marine KA-BAR Knife