The 75mm Reffye field gun appeared on the scene in the latter half of the 1800s. The design sported several unique concepts when compared to rival guns of the time - a sliding breech block and interrupted screw. This allowed the weapon to be effectively loaded/reloaded from the breech end of the weapon during a time when most all field guns were of muzzle-loading design. The system was developed by one Jean-Baptiste Verchere de Reffye which is where the gun also got its name - de Reffye serving as an artillery officer in the French Army at the time. He was also credited with development of one of the earliest machine guns to exist - the multi-shot "mitrailleuse".
The Reffye 75mm was introduced during 1873 and served until the turn of the century but was already under threat as soon as 1875 for, during that year, the French Army was already committing to the newer, more powerful 95mm Lahitolle series. These went on to see combat service with French forces in World War 1 (1914-1918).