A Dnieper Flotilla was constituted in June 1931, but disbanded in June 1940, its vessels distributed to the newly formed Danube Flotilla (since, with the Soviet occupation of Bessarabia and Northern Bukovina the Soviets now had a border on the Danube) and the Pinsk Flotilla. The Danube river was seized by the German and Romanian forces early in the 1941 invasion of the Soviet Union, and the Danube Flotilla was disbanded on November 21, 1941.