The "Second Happy Time", also known among German submarine commanders as the "American Shooting Season", was the informal name for the Operation Paukenschlag, a phase in the Battle of the Atlantic during which Axis submarines attacked merchant shipping and Allied naval vessels along the east coast of North America. The first "Happy Time" was in 1940–1941 in the North Atlantic and North Sea. Adolf Hitler and Benito Mussolini declared war on the United States on 11 December 1941, so their navies could begin the "Second Happy Time".
German submarine U-171 was a Type IXC U-boat of Nazi Germany's Kriegsmarine built for service during World War II. It was laid down on 1 December 1940 at the DeSchiMAG AG Weser yard at Bremen as yard number 1011, launched on 22 July 1941, and commissioned on 25 October 1941 under the command of Kapitänleutnant Günther Pfeffer.
German submarine U-48 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II, and the most successful that was commissioned. During her two years of active service, U-48 sank 55 ships for a total of 321,000 tons; she also damaged two more for a total of 12,000 tons over twelve war patrols conducted during the opening stages of the Battle of the Atlantic.
German submarine U-502 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 2 April 1940 at the Deutsche Werft yard in Hamburg with yardnumber 292, launched on 18 February 1941 and commissioned on 31 May under the command of Kapitänleutnant Jürgen von Rosenstiel.
German submarine U-38 was a Type IXA U-boat of Nazi Germany's Kriegsmarine that operated during World War II.
German submarine U-70 was a Type VIIC submarine of Nazi Germany's Kriegsmarine during World War II.
German submarine U-300 was a Type VIIC/41 U-boat of Nazi Germany's Kriegsmarine during World War II.
German submarine U-268 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II.
German submarine U-523 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 4 August 1941 at the Deutsche Werft yard in Hamburg as yard number 338. She was launched on 15 April 1942, and commissioned on 25 June under the command of Kapitänleutnant Werner Pietzsch. After training with the 4th U-boat Flotilla in the Baltic Sea, the U-boat was transferred to the 10th flotilla for front-line service on 1 February 1943.
German submarine U-96 was a Type VIIC U-boat of the German Navy (Kriegsmarine) during World War II. Her keel was laid down on 16 September 1939, by Germaniawerft, of Kiel as yard number 601. She was commissioned on 14 September 1940, with Kapitänleutnant Heinrich Lehmann-Willenbrock in command. Lehmann-Willenbrock was relieved in March 1942 by Oberleutnant zur See Hans-Jürgen Hellriegel, who was relieved in turn in March 1943 by Oblt.z.S. Wilhelm Peters. In February 1944, Oblt.z.S. Horst Willner took command, turning the boat over to Oblt.z.S. Robert Rix in June of that year. Rix commanded the boat until February 1945.
Wolf was a wolfpack of German U-boats that operated from 13 July to 1 August 1942, attacking Convoy ON 113 in the Battle of the Atlantic during World War II. They sank two ships sunk totalling 12,078 gross register tons (GRT) and damaged another (8,093 GRT).
Vorwärts was a wolfpack of German U-boats that operated from 25 August to 26 September 1942, in the Battle of the Atlantic during World War II. They attacked several convoys, principally Convoy ON 127, sailing from Liverpool to New York, and sank fifteen ships for a total of 79,331 gross register tons (GRT), and damaged nine (81,141 GRT).
German submarine U-84 was a Type VIIB U-boat of Nazi Germany's Kriegsmarine during World War II.
German submarine U-157 was a Type IXC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 21 October 1940 at the DeSchiMAG AG Weser yard in Bremen, launched on 5 June 1941, and commissioned on 15 September under the command of Korvettenkapitän Wolf Henne. After training with the 4th U-boat Flotilla, U-157 was transferred to the 2nd U-boat Flotilla for front-line service on 3 June 1942.
German submarine U-197 was a Type IXD2 U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 5 July 1941 at the DeSchiMAG AG Weser yard in Bremen as yard number 1043. She was launched on 21 May 1942, and commissioned on 10 October under the command of Korvettenkapitän Robert Bartels. After training with the 4th U-boat Flotilla at Stettin, U-197 was transferred to the 12th U-boat Flotilla for front-line service on 1 April 1943.
German submarine U-652 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 5 February 1940 at the Howaldtswerke yard at Hamburg, launched on 7 February 1941, and commissioned on 3 April 1941 under the command of Oberleutnant zur See Georg-Werner Fraatz.
Below is the timeline of maritime events during the Emergency,. This period was referred to as The Long Watch by Irish Mariners. This list is of events which affected the Irish Mercantile Marine, other ships carrying Irish exports or imports, and events near the Irish coast.
German submarine U-65 was a Type IXB U-boat of Nazi Germany's Kriegsmarine during World War II. Over the course of six war patrols between 9 April 1940 and 28 April 1941, she sank twelve ships and damaged three others for a total loss of 88,664 gross register tons (GRT).
German submarine U-442 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.
German submarine U-617 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 31 May 1941 by Blohm & Voss in Hamburg as yard number 593, launched on 14 February 1942 and commissioned on 9 April under Kapitänleutnant Albrecht Brandi.
