Jagdgeschwader 52 included the fighter ace who joined the Luftwaffe in what year?
Jagdgeschwader 52 "Jagdgeschwader" 52 (JG 52) (52nd Fighter Wing) of the Luftwaffe, was the most successful fighter-wing of all time, with a claimed total of more than 10,000 victories over enemy aircraft during World War II. It was the unit of the top three scoring flying aces of all time, Erich Hartmann, Gerhard Barkhorn and Günther Rall. The unit flew exclusively with the various versions of the Messerschmitt Bf 109 throughout the war.
Hermann Greiner Georg-Hermann Greiner (2 January 1920 – 26 September 2014) was a Luftwaffe night fighter ace who served during World War II. Greiner was recipient of the Knight's Cross of the Iron Cross with Oak Leaves—the fourth highest German award by war's end. He was also a squadron commander in the prestigious "Nachtjagdgeschwader" 1 ("NJG" 1—Night Fighter Wing 1), the most successful night fighter interceptor unit of any nation in the history of aerial warfare.