Fighting knife

A fighting knife is a knife with a blade designed to inflict a lethal injury in a physical confrontation between two or more individuals at very short range (grappling distance). The combat knife, and the trench knife, are examples of military fighting knives.

Fighting knives were traditionally designed as special-purpose weapons, intended primarily if not solely for use in personal or hand-to-hand combat. This singularity of purpose originally distinguished the fighting knife from the field knife, fighting utility knife, or in modern usage, the tactical knife. The tactical knife is a knife with one or more military features designed for use in extreme situations, which may or may not include a design capability as a fighting or combat weapon. Since World War I, the fighting knife in military service has gradually evolved into a dual-purpose or "fighting-utility" knife, suited for both knife fighting and utility roles. As a consequence, the terms "fighting knife" and "tactical knife" are frequently employed interchangeably.