The Bergmann MP 18.1 was the first practical submachine gun ever fielded. Following the 1917 recommendations of the German Rifle Testing Commission (Spandau) for an individual, light weight weapon capable of fully automatic fire, Hugo Schmeisser was asked to develop a weapon for the close quarters combat of trench warfare. The weapon was designed around the German military pistol cartridge, the 9mm Parabellum. This, along with the use of a shoulder stock, allowed the weapon to be controllable in fully automatic fire, giving the user the ability to engage multiple targets in cramped quarters in a very short amount of time. Yet the weapon was still effective to ranges exceeding 100 meters. Thus, the Maschinenpistole, Model 1918 (MP18/I) was born.