 On January 1, 1929, Kasprzycki was promoted to the rank of Brigadier general, and in July 1931, he became Deputy Minister of Military Affairs.On May 12, 1935, after the death of Józef Piłsudski, Kasprzycki was named Minister of Military Affairs by the President of Poland and remained in this post until September 30, 1939.On March 19, 1936, he was promoted to Divisional general.