A scabbard is a sheath for holding a sword, knife, or other large blade. Scabbards have been made of many materials over the millennia, including leather, wood, and metals such as brass or steel.
Most commonly, scabbards were worn suspended from a sword belt or shoulder belt called a baldric.
Wooden scabbards were usually covered in fabric or leather, and leather versions also usually bore metal fittings for added protection and carrying ease. Japanese blades, however, typically have their sharp cutting edge protected by a wooden scabbard called a saya. Many scabbards like the ones the Greeks and Romans used were small and light. They were designed for holding the sword rather than protecting it. All-metal scabbards were popular items for a display of wealth among elites in the European Iron Age, and often intricately decorated. Little is known about the scabbards of the early Iron Age, due to their wooden construction. However, during the Middle and late Iron Ages, the scabbard became important especially as a vehicle for decorative elaboration. After 200 BC fully decorated scabbards became rare. A number of ancient scabbards have been recovered from weapons sacrifices, a few of which had a lining of fur on the inside. The fur was probably kept oily, keeping the blade free from rust. The fur would also allow a smoother, quicker draw.
Entirely metal scabbards became popular in Europe early in the 19th century and eventually superseded most other types. Metal was more durable than leather and could better withstand the rigors of field use, particularly among troops mounted on horseback. In addition, metal offered the ability to present a more military appearance, as well as the opportunity to display increased ornamentation. Nevertheless, leather scabbards never entirely lost favor among military users and were widely used as late as the American Civil War (1861–65).
Some military police forces, naval shore patrols, law enforcement and other groups used leather scabbards as a kind of truncheon.
Scabbards were historically, albeit rarely, worn across the back with the intention of being quickly unsheathed, but only by a handful -if that- of Celtic tribes, and only with very short lengths of sword. This is because it is almost impossible to draw any true two-handed sword, and extraordinarily difficult to draw the majority of one-handed swords from a scabbard on the back. common depictions of longer swords being drawn from the back are a modern invention and have enjoyed great popularity in fiction and fantasy, to the point that they are widely believed to have been common in Medieval times. Some well-known examples of this include the back scabbard depicted in the movie Braveheart and the back scabbard seen in the video game series The Legend of Zelda (although some of the swords in this game series are short enough to be drawn this way). There is some limited data from woodcuts and textual fragments that Mongol light horse archers, Chinese soldiers, Japanese Samurai, and European Knights wore a slung baldric over the shoulder, allowing longer blades such as greatswords/zweihanders and nodachi/ódachi to be strapped across the back, though these would have to be removed from the back before the sword could be unsheathed.