Under the guidance of his new commander, who recognised the hidden potential in the young officer, Marseille started to improve his abilities as a fighter pilot. He reached the zenith of his fighter pilot career on 1 September 1942, when during the course of three combat sorties he claimed 17 enemy fighters shot down, earning him the Ritterkreuz mit Eichenlaub, Schwertern und Brillianten (Knight's Cross with Oak Leaves, Swords, and Diamonds). Only 29 days later, Marseille was killed in a flying accident, when an engine failure forced him to abandon his fighter. After he exited the smoke-filled cockpit, Marseille's chest struck the vertical stabiliser of his aircraft, either killing him instantly, or incapacitating him so that he was unable to open his parachute.
Almost like fate. One man celebrated, quite rightly in war time, for his greatness in killing other men so often goes west in unlikely circumstances. Many of the top aces of both wars were killed in strange or one off incidents from what I have read.