text: Between 1935 and 1938, there were several newly created and self-governed special border okrugs (okruhas) located along the western border of the Soviet Union in Ukraine and Belarus. Upon liquidation of the okruhas in 1937–1938, Kyiv, Vinnytsia, Odesa, and Kharkiv oblasts were each split into four additional oblasts (Zhytomyr Oblast, Kamianets-Podilsky Oblast (later Khmelnytskyi), Mykolaiv Oblast, Poltava Oblast). Just before World War II, the Donetsk Oblast was split into Stalino Oblast and Voroshylovhrad Oblast and the Kirovohrad Oblast was created out of portions of Kyiv, Mykolaiv and Odesa oblasts.
  During World War II, Ukraine added eight more oblasts of the West Ukraine and Bessarabia. Upon the occupation of Ukraine by Nazi Germany the territory was split between General Government, Kingdom of Romania and Reichskommissariat Ukraine and carried out a completely different administrative division, see Reichskommissariat Ukraine. With the re-establishing of Soviet power in the state after the war, the administrative division by oblast resumed, adding one more oblast—Zakarpattia. In 1954, the Crimean Oblast was transferred from the Russian Soviet Federative Socialist Republic to the Ukrainian SSR; parts of the surrounding oblasts were incorporated into the Cherkasy Oblast, while Izmail Oblast was absorbed by Odesa Oblast. In 1959, Drohobych Oblast was merged with Lviv Oblast.