The Provisional Polish Revolutionary Committee was formed by the Communist Party of the Soviet Union, as a provisional government from territories of Poland conquered during the war. It announced its governance over the state on 30 July 1920, in Białystok, the first major city west of the Curzon Line.Witold Sienkiewicz: Niepokonani 1920, Demart 2010, 2011, ISBN 978-83-7427-587-3. The committee announced its plan to create a Polish SSR in its Manifesto to the Polish working class of towns and villages (Polish: Manifest do polskiego ludu roboczego miast i wsi) by Felix Dzerzhinsky, which was announced in Vilnius on 30 July 1920.Sylwia Frołow: Dzierżyński. Miłość i rewolucja, Znak Horyzont, Kraków, 2014, p. 211. It stated, that the committee planned to create the Soviet republic following the gaining of Bolshevik control of the entirety of Poland.
