Operation N (Polish: Akcja N, where "N" stands for the Polish word "Niemcy," "Germany") was a complex of sabotage, subversion and black-propaganda activities carried out by the Polish resistance against Nazi German occupation forces during World War II, from April 1941 to April 1944. These activities were organized by Office N, which in October 1941 was transformed into an Autonomous Sub-Department N of the Bureau of Information and Propaganda of the Armed Resistance, later of the Home Army. It was headed by Tadeusz Żenczykowski (codename Kania).