Gulf of Finland U-boat campaign

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Gulf of Finland campaign
Part of the Baltic Sea campaign of the Eastern Front of World War II
U-250 being commissioned, 12 December 1943
Date 1944-1945 Location Baltic Sea Result Allied victory
Belligerents
Germany  Finland (until September 1944)	Soviet Union  Finland (from September 1944)
Commanders and leaders
Albrecht Brandi
Strength
13 u-boats (first phase)	Anti-submarine boats
Casualties and losses
5 u-boats sunk and 1 damaged.	1 Finnish merchant sunk 1 Soviet landing craft sunk 1 Soviet survey vessel and 2 barges sunk Finnish minelayer Louhi sunk 1 Soviet minesweeper sunk 4 Soviet small submarine chasers sunk and 2 damaged 4 Soviet small minesweepers sunk and 1 damaged 1 motor torpedo boat damaged 4 Finnish fishing boats sunk and 1 damaged

The Gulf of Finland U-boat campaign lasted in the Gulf of Finland during the World War II against the Soviet Union between summer 1944 and spring 1945. During the campaign Finland switched sides and joined the Allies.