Regions of Belarus
In Soviet Belarus, new administrative units, called oblast or voblast  were created in 1938. And again, during World War II, the borders changed. In 1939 they were reset with Belarus gaining territory to the west, Baranavichy, Belastok (Białystok), Brest, Pinsk, and Vileyka oblasts. In 1944 Belastok was removed and the new oblasts of Babruysk, Grodno, and Polotsk were created. At the same time, Vileyka Oblast was renamed Molodechno Oblast.