The Soviet occupation began on June 28, 1940. In addition to Bessarabia, the USSR demanded Northern Bukovina as compensation for the occupation of Bessarabia by Romania from 1918 to 1940. Hertza region was not included in the demands that the Soviet Union addressed to Romania, but was occupied at the same time. Most of the occupied territories were organized on August 2, 1940 as the Moldavian Soviet Socialist Republic, while the remainder, including the Chenivtsi Oblast, which was formed on August 7, 1940, were included in the Ukrainian Soviet Socialist Republic.