Dreyse needle gun
The first successful employment of marching fire may be traced to the fast-firing Dreyse needle gun used by Prussian troops in the mid-19th century. This new breech-loading gun was 2–3 times faster than contemporary muzzle-loading guns, and its lightweight cartridge allowed the infantryman to carry more ammunition. A major disadvantage was that escaping hot gases from the breech would strike the face of any trooper who took careful aim. Accordingly, the weapon was often fired while being held away from the face with the result that marksmanship was inferior. In 1866, Prussians were successful in advancing quickly while firing their needle guns in the Battle of Königgrätz; the decisive battle of the Austro-Prussian War. Soon, though, the increased use of rapid-fire guns by defending troops neutralized the advantage.