The region's origins can be traced to the Moldavian Autonomous Soviet Socialist Republic which was formed in 1924 within the Ukrainian SSR. During World War II, the Soviet Union took parts of the Moldavian ASSR, which was dissolved, and of the Kingdom of Romania's Bessarabia to form the Moldavian Soviet Socialist Republic in 1940. The present history of the region dates to 1990, amidst the disintegration of the Soviet Union, when the Pridnestrovian Moldavian Soviet Socialist Republic was established in hopes that it would remain within the Soviet Union should Moldova seek unification with Romania or independence, the latter occurring in August 1991. Shortly afterwards, a military conflict between the two parties started in March 1992 and was concluded by a ceasefire in July of the same year.