The Communist Party of Western Belorussia (Polish: Komunistyczna Partia Zachodniej Białorusi, KPZB; Belarusian: Камуністычная партыя Заходняй Беларусі, КПЗБ) was a banned political party in the Interwar Poland,[1] active in the territory of present-day West Belarus from 1923 until 1939; in Polesie (1932–1933) Słonim county (1934) and Vilnius.
Although its name, the Communist Party of Western Belarus, could suggest a desire for independence of Belarus, wrote historian Sergiusz Łukasiewicz, in reality the party aimed for the transfer of eastern provinces of Poland to the Soviet Union.
The party worked undercover; in 1925-1927 it masked its illegal activities under the legal Belarusian Peasants' and Workers' Union in Poland.
It received support from the Soviet Union with leadership brought in secretly from across the border (see Vera Kharuzhaya).
[2] In 1938, following a decision by the Comintern on the orders of Joseph Stalin, the KPZB along with the Communist Party of Poland and the Communist Party of Western Ukraine were delegalized by the USSR under the charge of affiliation with the Polish bourgeoisie.