 In 1956, Hartmann joined the newly established West German Luftwaffe in the Bundeswehr, and became the first Geschwaderkommodore of Jagdgeschwader 71 "Richthofen". Hartmann resigned early from the Bundeswehr in 1970, largely due to his opposition to the F-104 Starfighter deployment in the Luftwaffe and the resulting clashes with his superiors over this issue. In his later years, after his military career had ended, he became a civilian flight instructor. He died of natural causes on 20 September 1993.
