In November 1918, after 123 years of partitions, Poland regained its independence. Six weeks after the event, as a result of a combination of Polish radical left-wing movements, the Communist Workers' Party of Poland (since 1925, the Communist Party of Poland) was established, which aimed among other things, for the liquidation of independent Poland by incorporating it into the Bolsheviks' state. The chance to realize these dreams appeared very soon because only in the years 1919-1920 Polish communists eagerly supported the aggression of the Red Army against Poland.