Jagdgeschwader 52 included the fighter ace who joined the Luftwaffe in what year?
Gerhard Barkhorn Gerhard "Gerd" Barkhorn (20 March 1919 – 8 January 1983) was the second most successful fighter ace of all time after fellow "Luftwaffe" pilot Erich Hartmann, the two people to ever exceed 300 confirmed victories. Barkhorn joined the "Luftwaffe" in 1937 and completed his training in 1939.
Karl-Heinz Greisert Karl-Heinz Greisert (2 February 1908 – 22 July 1942) was World War II Luftwaffe ace and a Geschwaderkommodore of JG 2 and recipient of the German Cross in Gold on 5 June 1942.