The new Polish Provisional Government of National Unity ( '' Tymczasowy Rząd Jedności Narodowej '' , TRJN ) — as the Polish government was called until the elections of 1947 — was established on 28 June 1945 . Osóbka-Morawski was kept as prime minister , Gomułka became first deputy prime minister and Mikołajczyk second deputy and minister of agriculture . The government was " provisional " and the Potsdam Conference soon declared that before a regular government is created , free elections must be held and a permanent constitutional system established
Potsdam Conference
Potsdam Conference
History of Poland (1945–1989)