History of Poland
The Polish People's Republic ("Polska Rzeczpospolita Ludowa") was established under the rule of the communist Polish United Workers' Party (PZPR). The name change from the Polish Republic was not officially adopted, however, until the proclamation of the Constitution of the Polish People's Republic in 1952.
Milicja Obywatelska
Milicja Obywatelska (; Citizens' Militia), commonly abbreviated to MO, was the national police organization of the Polish People's Republic. It was created on 7 October 1944 by the Soviet-sponsored Polish Committee of National Liberation, effectively replacing the pre-war police force. The Citizen's Militia would remain the predominant means of policing in Poland until 6 April 1990, when it was transformed back into "Policja".