Polish People's Party (1945–1949)
The Polish People's Party (Polish Peasant Party, Polskie Stronnictwo Ludowe – PSL) existed in post-World War II Poland from 1945 to 1949. In a period of increasing solidification of communist power in Poland but with the political system retaining some formal adherence to multiparty democracy principles, the PSL was a broadly left-wing non-communist party that was not allied with the communists.
Source: Wikipedia — Polish People's Party (1945–1949) (CC BY-SA 4.0)