Military service
Michał Zieliński got assignment to 3 Pułk Piechoty Legionów (3rd Infantry Regiment of Legion) in Jarosław in 1926. Having completed his military training, he became a member ofthe regimental orchestra as a professional musician. He could play the oboe, the flute and the drums. Since 1930 he took part in the concerts of the regimental orchestra organised during the summer season in a Polish spa Truskawiec-Zdrój. On 1st September 1939, the day of the beginning of World War II, he became subordinated to the commander of 1st Infantry Battalion.