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.
Armia Ludowa
Seven months after it came into existence, on 21 July 1944, the People's Army was integrated into the Polish Military in the USSR and formed the new People's Army of Poland ("Ludowe Wojsko Polskie", "LWP"). After the Red Army and the Soviet-organized 1st Polish Army entered Poland late in 1944 and early 1945, most People's Army members joined the communist 1st Polish Army. After the war, many of its members joined the ranks of the Ministry of Public Security of the People's Republic of Poland, or the "Milicja Obywatelska" (police).