Leutnant Kurt Wintgens of the then-named German Deutsches Heer's Fliegertruppe army air service achieves the first known aerial victory with a synchronized machine-gun armed fighter plane, the Fokker M.5K/MG Eindecker.

Leutnant is the lowest junior officer rank in the armed forces of Germany (Bundeswehr), the Austrian Armed Forces, and the military of Switzerland.

Leutnant Kurt Wintgens was a German World War I fighter ace. He was the first fighter pilot to score an aerial victory with a synchronized machine gun. Wintgens was the recipient of the Iron Cross and the Pour le Mérite.

The Imperial German Army (1871–1919), officially referred to as the German Army, was the unified ground and air force of the German Empire. It was established in 1871 with the political unification of Germany under the leadership of Prussia, and was dissolved in 1919, after the defeat of the German Empire in World War I (1914–1918). In the Federal Republic of Germany, the term Deutsches Heer refers to the German Army, the land component of the Bundeswehr.

The Deutsche Luftstreitkräfte – known before October 1916 as Die Fliegertruppen des deutschen Kaiserreiches – was the air arm of the Imperial German Army. In English-language sources it is usually referred to as the Imperial German Air Service, although that is not a literal translation of either name. German naval aviators of the Marine-Fliegerabteilung were an integral part of the Imperial German Navy. Both military branches operated aeroplanes, observation balloons and airships.