The Milicja Obywatelska (Polish pronunciation: [miˈlit͡sja ɔbɨvaˈtɛlska]; MO), known as the Citizens' Militia in English, was the national police organization of the Polish People's Republic.
The MO was established on 7 October 1944 by the Polish Committee of National Liberation under Chief Commander Franciszek Jóźwiak to police Red Army controlled areas of Poland during World War II. It became the official police force with the founding of the Polish People's Republic in 1947, effectively replacing the pre-war Policja as the main uniformed civilian police of Poland during the communist era. The MO was headquartered in Warsaw while training for the force was conducted in the town of Legionowo.