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 adjoined to the Soviet Union on 3, 5 and 6 August respectively. The final republic was the Moldovian SSR that merged the large territory of Bessarabia with the Moldovian ASSR previously part of the Ukrainian SSR. After World War II, no new republics were established, instead, the Karello-Finnish SSR was downgraded into an autonomous republic and re-annexed by the RSFSR on July 16, 1956. On December 8, 1991, the leaders of the Ukrainian and Belorussian SSRs, and the RSFSR met to agree on the annulment of the 1922 treaty, which was terminated on December 25, 1991, effectively dissolving the USSR.