Jagdgeschwader z.b.V.

Jagdgeschwader z. b. V. (JG z. b. V.) was a Luftwaffe fighter-wing of World War II. JG z.b.V. was formed April 20, 1944 in Kassel, to control III./JG 3, I./JG 5, II./JG 27, III./JG 54 and II./JG 53. On June 15, 1944 it was redesignated Stab/JG 4 and its first Geschwaderkommodore was Major Gerhard Michalski. The abbreviation z. b. V. is German and stands for  zur besonderen Verwendung (for special deployment). In 1944 JG z. b. V. was subordinated to the 7. Jagd-Division and used in the Reichsluftverteidigung (Defense of the Reich) from bases in Kassel and Ansbach.

Geschwaderkommodore

 * Major Gerhard Michalski, 20 April 1944 – 20 May 1944
 * Hauptmann Walther Dahl, 20 May 1944 – 6 June 1944
 * Major Gerhard Schöpfel, 6 June 1944 – 15 June 1944