Union of Polish Patriots

The ZPP, unofficially controlled and directed by Joseph Stalin, became one of the founding structures of the Soviet-controlled communist government that after World War II took power in Poland.

[1][4] The ZPP was organized from 1 March and its significance increased after the Soviet Union broke relations with the Polish government-in-exile in April 1943, following the discovery of the Katyn massacre.

[5] The ZPP issued a declaration condemning the Polish government-in-exile led by Władysław Sikorski,[5] as a body whose actions were damaging the "Anglo-Russo-American bloc".

The ZPP relinquished the Polish claims to the disputed eastern borderlands (Kresy) as consisting of Ukrainian, Belarusian and Lithuanian territories, thus denouncing the borders implemented at the Peace of Riga in 1921.

[1][2][5] The ZPP published its own weekly Wolna Polska ('The Free Poland'), edited from 1 March 1943 by Wasilewska, and the biweekly Nowe Widnokręgi ('New Horizons'), founded by her still earlier.

[5] In late 1943, the ZPP established the Polish National Committee (Polski Komitet Narodowy, PKN), with the intention of turning it into a communist-dominated provisional government of Poland.