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.
Hannes Trautloft Johannes "Hannes" Trautloft (3 March 1912 – 11 January 1995) was a German World War II fighter ace who served in the Luftwaffe from 1932 until the end of the war and again from 1957–70. He flew 560 combat sorties and was credited with 58 victories.