The Provisional Polish Revolutionary Committee was formed by 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 on the west from the Curzon Line.[3] The Committee announced its plan to create 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.[4] It stated, that the committee planned to create the Soviet republic following gaining the control in entire Poland.[3]