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.
Heinz-Gerhard Vogt Gerhard Vogt (29 November 1911 – 14 January 1945) was a German Luftwaffe fighter ace and recipient of the Knight's Cross of the Iron Cross during World War II. The Knight's Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. Gerhard Vogt scored 48 victories in 174 missions. All of his victories were recorded over the Western Front, and included eight four-engined bombers.