Ukrainian Soviet Socialist Republic
Eventually, after the creation of the Communist Party (Bolshevik) of Ukraine in Moscow, a third Ukrainian Soviet government was formed on 21 December 1919 that initiated new hostilities against Ukrainian nationalists as they lost their military support from the defeated Central Powers. Eventually, the Red Army ended up controlling much of the Ukrainian territory after the Polish-Soviet Peace of Riga. On 30 December 1922, along with the Russian, Byelorussian, and Transcaucasian republics, the Ukrainian SSR was one of the founding members of the Union of Soviet Socialist Republics (USSR).
Russification of Ukraine
Russification of Soviet-occupied Ukraine intensified in 1938 under Nikita Khrushchev, then secretary of the Ukrainian Communist Party, but was briefly halted during World War II, when Axis forces occupied large areas of the country. After the war ended, Western Ukraine was reabsorbed into the Soviet Union, and most prominent Ukrainian intellectuals living there were purged or exiled to Siberia. Leonid Brezhnev continued the Russification policies of Khrushchev in postwar Ukraine.
In the 1960s, the Ukrainian language began to be used more widely and frequently in spite of these policies. In response, Soviet authorities increased their focus on early education in Russian. After 1980, Russian language classes were instituted from the first grade onward. In 1990 Russian became legally the official all-Union language of the Soviet Union, with constituent republics having rights to declare their own official languages.