At the time of the formation of the PKWN, the principal Polish authority in
German-occupied Poland was the
Polish Underground State network of organizations loyal to the Polish government-in-exile, resident in
London. As the Red Army, fighting
Nazi German forces, entered Polish territory,
Joseph Stalin and Polish communists proceeded with the establishment of a rival executive authority, one that they could trust. The PKWN was formed in negotiations involving primarily the main Polish communist organizations, the
Union of Polish Patriots (ZPP) and the
Polish Workers' Party (PPR). The
Polish communist movement had been decimated during the
Soviet purges in the 1930s, but revived under Stalin's auspices beginning in 1940. The PPR was a new party organized in
occupied Poland, the ZPP originated during the war in the Soviet Union. The PPR had already established in
Warsaw a conspiratorial
State National Council (KRN), which they declared to be the wartime national parliament. Because of war-related obstacles, the communist leaders arriving from Warsaw (the PPR delegation that included
Władysław Gomułka and
Bolesław Bierut) reached
Lublin only on 31 July, and attained full agreement with the group from
Moscow (ZPP) on 15 August. The documents they produced were antedated to 21 July to comply with the declarations issued as of 22 July. The
PKWN Manifesto, proclaimed on 22 July 1944, was outlined in advance in a
Radio Moscow broadcast. The PKWN, located in Lublin, became known as the Lublin Committee. While the administrative authority in Poland was granted to the PKWN, many aspects of wartime governance were determined by the Soviet military surveillance. As the Red Army and the allied Polish Army moved into Polish territory, the PKWN expanded its authority within the liberated areas, except for
Kresy (prewar eastern Poland), intended by the
Allies to be incorporated into the Soviet Union (see
Tehran Conference,
Yalta Conference). ==Membership==