Built at first by Rene Hanriot and Pierre Dupont at Billancourt, Paris, this attractive French fighter found little interest with the Aviation Militaire, who did not use it operationally. The Italian Air Force thought otherwise; producing large numbers at the Nieuport-Macchi factory at Varese and adopting the aircraft as its most widely-used fighter, in Italy, Albania and Macedonia. it also equipped the Belgian Aviation Militaire and was used by the French and United States Navies.
During the early months of the Great War the Dutchman, Anthony Fokker, supplied three monoplane designs to the German Army. In April 1915 Fokker was asked to develop one of these to be armed with a fixed machine gun firing forwards through the propeller. Three months later an interrupter gear was devised by Fokker and Lubbe and fitter into the Fokker M5k single-seat monoplane already in service. The airplane was then given the military title of Fokker E-1. The E-1 was powered by the 80hp Oberursel rotary engine and was soon replaced by the E-11 and the E-111 both with the 100hp Oberursel. At first, armament was a single Parabellum gun but the standard equipment soon became the Spandau. The E-IV, a larger machine, powered by the 160hp Oberursel was armed with two Spandau’s. The Fokker Eindecker entered service in later 1915 to start the ‘Fokker Scourge’ that gave German’s air superiority. 258 were built and used by the German’s, Austro-Hungarians and Turks. Production ended in July 1916 when the airplane had become thoroughly obsolete.