Ministry of the Maritime Fleet (Soviet Union) 1922 and was collapsed in 1991. But Minforflot has more short history. Until 25 May 1939, functions of the Ministry of Maritime Fleet USSR were carried out by the People's Commissariat of Water Transport of the USSR, which was responsible for both maritime and river fleets of the USSR. The structure of the People's Commissariat of Maritime Fleet USSR as a separate people's commissariat was confirmed by a decree of the Council of Ministers USSR on 25 May 1939. On 15 March 1946, the People's Commissariat of Maritime Fleet USSR was changed to the Ministry of Maritime Fleet USSR by
Treaty on the Creation of the USSR Autonomous Soviet Socialist Republic of the RSFSR ceased to exist, and its territory was divided between the new Kazakh and Kirghiz SSRs. In a prelude to World War II, several new republics were created prior to the German invasion of USSR in 1941. The first was the Karelo-Finnish SSR, which on 31 March 1940 was elevated to a union republic from the Karelian ASSR, previously part of the RSFSR. After the annexation of Baltic states, Lithuania, Latvia and Estonia were transformed into the Lithuanian SSR (July 13), Latvian SSR (July 21) and Estonian SSR (also July 21), and were formally