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  2. Black May (1943) - Wikipedia

    en.wikipedia.org/wiki/Black_May_(1943)

    In May 1943, U-boat strength reached its peak, with 240 operational U-boats of which 118 were at sea, yet the sinking of Allied ships continued to decline. [2] May 1943 also had the greatest losses suffered by U-boats up to that time, with 41 being destroyed, 25 per cent of the operational U-boats. [3]

  3. German submarine U-352 - Wikipedia

    en.wikipedia.org/wiki/German_submarine_U-352

    German submarine U-352 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 11 March 1940, at the Flensburger Schiffbau-Gesellschaft yard at Flensburg , launched on 7 May 1941, and commissioned on 28 August 1941, under the command of Kapitänleutnant Hellmut Rathke.

  4. Battle of the St. Lawrence - Wikipedia

    en.wikipedia.org/wiki/Battle_of_the_St._Lawrence

    U-boat losses experienced by the Kriegsmarine during 1942 following the entry of the United States Navy into the Battle of the Atlantic, coupled with declining German shipbuilding capability to replace battle losses, saw the U-boat fleet redeployed to the primary Atlantic convoy routes to disrupt the Allied war resupply effort; this effectively ...

  5. Convoy battles of World War II - Wikipedia

    en.wikipedia.org/wiki/Convoy_Battles_of_World_War_II

    Convoy Battles of World War II occurred when convoys of warships protected cargo ships assembled for mutual defense and were attacked by submarines, surface ships and/or aircraft. Most were in the North Atlantic from 1939 to 1943 and involved attacks by U-boat wolfpacks .

  6. German submarine U-47 (1938) - Wikipedia

    en.wikipedia.org/wiki/German_submarine_U-47_(1938)

    German submarine U-47 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II. [1] She was laid down on 25 February 1937 at Friedrich Krupp Germaniawerft in Kiel as yard number 582 and went into service on 17 December 1938 under the command of Günther Prien.

  7. German submarine U-864 - Wikipedia

    en.wikipedia.org/wiki/German_submarine_U-864

    German submarine U-864 was a Type IXD2 U-boat of Nazi Germany's Kriegsmarine in World War II. On 9 February 1945, she became the only submarine in history to be sunk by an enemy submarine while both were submerged. U-864 was sunk by the British submarine HMS Venturer, and all 73 men on board died.

  8. Convoy ONS 5 - Wikipedia

    en.wikipedia.org/wiki/Convoy_ONS_5

    The North Atlantic battle surrounding it in May 1943 is regarded as the turning point of the Battle of the Atlantic in World War II. The battle ebbed and flowed over a period of a week, and involved more than 50 Allied ships and their escorts, and over 30 U-boats. It saw heavy losses on both sides.

  9. Gulf of Finland U-boat campaign - Wikipedia

    en.wikipedia.org/wiki/Gulf_of_Finland_U-boat...

    On 15 July 1944, U-679 was attacked by small Soviet boats: during a gunnery battle, the motor torpedo boat TK-57 suffered damages and two of her torpedoes barely missed the submarine. U-679 fled under cover of Finnish ground artillery. On 18 July 1944, U-479 damaged the Soviet submarine chaser MO-304 (later repaired).