Jagdgeschwader I (World War I)
Jagdgeschwader I (JG I) of World War I, was a fighter wing of the German Luftstreitkräfte, comprising four Jastas (fighter squadrons). The first unit of its type formed under that classification, JG I was formed on 24 June 1917, with Manfred von Richthofen as commanding officer, by combining Jastas 4, 6, 10 and 11.
Source: Wikipedia — Jagdgeschwader I (World War I) (CC BY-SA 4.0)