 Beginning 1940, he worked for the Bureau of Information and Propaganda of the Headquarters of Armia Krajowa (Home Army).He was chief of the Action "N" (anti-German subversive propaganda), while from 1943 he headed the Action "Antyk" (anti-Soviet propaganda), as well as of "Rój" - preparation of insurgent propaganda.He took part in the Warsaw Uprising as chief of propaganda of Armia Krajowa.