Marian Bełc graduated from pilot training at Lublinek air base near Łódź.

During the Invasion of Poland Bełc shot down his first plane, on 3 September a Bf 109.

[4] In the same unit served two other Polish aces: Jan Zumbach and Stanisław Karubin.

[6] On 15 April 1941 married Audrey Stephenson, their son Marian Edward was born on 27 October 1941.

On 27 August 1942, in a training flight with a British pilot their plane crash-landed.