Submarine warfare in the Black Sea campaigns (1944)

Submarine warfare in the Black Sea in World War II
Part of the Black Sea Campaigns of the Eastern Front of World War II
U-9 in 1936, the submarine was the only direct U-boat loss by Soviet attack on Black Sea
Date 1944 Location Western and Eastern Black Sea Result Allied victory
Belligerents
Germany  Romania (until 23 Aug. 1944)	Soviet Union  Romania (from 23 Aug. 1944)
Strength
6 German U-boats 2 Romanian submarines Anti-submarine forces	16 submarines Anti-submarine forces
Casualties and losses
1 submarine sunk 5 submarines scuttled 1 transport sunk 1 tanker damaged 1 Bulgarian vessel sunk	3 submarines lost 1 torpedo boat damaged 1 minesweeper sunk 1 patrol boat sunk, 1 damaged 1 landing craft sunk 1 tanker sunk 2 barges sunk 1 tug sunk 1 passenger ship sunk 1 Romanian tanker sunk
1 neutral Turkish vessel sunk 1 refugee ship sunk

Submarine warfare in the Black Sea in World War II during 1944 involved engagements between submarines of the Soviet Black Sea Fleet attacking Axis merchantmen, defended by Romanian and German naval warships, as well as German U-boats and Romanian submarines attacking Soviet merchants on the eastern Black Sea. Before the conclusion of the campaign, Romania joined the Allies after King Michael's Coup. These engagements were a part of the naval Black Sea campaigns.