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. Fighting knives were traditionally designed as special-purpose weapons, intended primarily if not solely for use in personal or hand-to-hand combat. This singleness 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. History Ancient history Utility knives with stone or flint blades were undoubtedly used in personal combat since Paleolithic times. One of the earliest metal-blade fighting knives was the dagger. The first early Bronze Age daggers featured Beaker copper blades, probably done with stone tools. In 1984, a Beaker period (ca. 2500 – 2000 BC) copper dagger blade was recovered from the Sillees River near Ross Lough, County Fermanagh, Northern Ireland that had a remarkably modern appearance. The flat, triangular-shaped copper blade was 171 mm (6.75 inches) long, 42.5 mm (1.65 inches) wide, and 2mm (0.078 inches) in maximum thickness, with bevelled edges and a pointed tip, and featured an integral tang that accepted a riveted handle. Analysis of the copper used in the dagger's construction revealed it to be of a type characteristic of the copper that was widely used in Ireland before the introduction of bronze tools and weapons. By around 2000 BC daggers were being cast of bronze, with blades formed by drawing and hammering the metal on bronze anvils set in guides. Post-classical history An early iron-bladed knife that served a dual purpose as fighting knife and utility blade was the seax, a pattern-welded weapon which dates from the 5th century AD, and worn as standard armament by Anglo-Saxon warriors from northern Italy as far north as Scandinavia and as far west as Ireland. The seax of the 5th and 6th century was shorter and narrower than those introduced later on, and could be described as either a large dagger or