From July 1920 he served in the Polish-Soviet War, in the newly formed Toruńska Eskadra Wywiadowcza (Toruń Reconnaissance Squadron) in the rank of pilot sergeant.

For his combat flight of 16 July 1920, he was decorated with the – newly introduced – Cross of Valor, and promoted to lieutenant.

After the Polish-Soviet War he participated in the preparations for the Third Silesian Uprising and in actual terror operations beginning 2/3 May 1921, commanding a special-forces detachment of the Wawelberg Group.

He served as chief pilot in Polish Air Force Academy (Wyższa Szkoła Oficerska Sił Powietrznych).

Meissner is most known as the author of 48 popular books on flying, pilots, sea, pirates, sport, as well as hunting.