 In August 1936 he received the rank of podporucznik and joined the 111th Fighter Escadrille.In 1937 he was transferred to the 114th Fighter Escadrille.During the Polish September Campaign in September 1939 he served (from 5 September) as the deputy commander of the 114th Escadrille, which together with several other air units was a part of the Pursuit Brigade.