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-Friedrich Joppien Hermann-Friedrich Joppien (19 July 1912 – 25 August 1941) was a German fighter pilot during World War II. A fighter ace, he was credited with 70 enemy aircraft shot down in roughly 270 combat missions. He claimed 42 victories over the Western Front, of which 23 were Supermarine Spitfires, the remaining victories were recorded over the Eastern Front.