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U-995, a typical VIIC/41 U-boat on display at the Laboe Naval Memorial. U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars.The term is an anglicized version of the German word U-Boot ⓘ, a shortening of Unterseeboot (under-sea boat), though the German term refers to any submarine.
The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies, largely in the seas around the British Isles and in the Mediterranean, as part of a mutual blockade between the German Empire and the United Kingdom.
The Atlantic U-boat campaign of World War I (sometimes called the "First Battle of the Atlantic", in reference to the World War II campaign of that name) was the prolonged naval conflict between German submarines and the Allied navies in Atlantic waters—the seas around the British Isles, the North Sea and the coast of France.
German U-boat U-14 (early 1910s) Unrestricted submarine warfare is a type of naval warfare in which submarines sink merchant ships such as freighters and tankers without warning. The use of unrestricted submarine warfare has had significant impacts on international relations in regard to both the First World War and the Second World War. Its ...
Type U 31 was a class of U-boats built during World War I by the Kaiserliche Marine. Between 1912 and 1915 eleven were built on Germaniawerft in Kiel , amongst these top-three-scoring U-35 with the famous Lothar von Arnauld de la Perière as commander, U-39 with Walter Forstmann and U-38 with Max Valentiner .
SM U-103 [Note 1] was an Imperial German Navy Type U 57 U-boat that was rammed and sunk by HMT Olympic during the First World War. U-103 was built by AG Weser in Bremen, launched on 9 June 1917 and commissioned 15 July 1917. She completed five tours of duty under Kptlt.
Deutschland made two successful commercial voyages before being commissioned into the Kaiserliche Marine on February 17, 1917, as U-155. [citation needed]Max Valentiner commanded a Type U 151 U-boat, U-157, and undertook the longest cruise in the war from 27 November 1917 to 15 April 1918, a total of 139 days.
Throughout the year U-boats were still able to find and sink ships sailing independently. By 1918, however, the U-boats' successes began to drop. In January 1918, German U-boats sank 103,738 long tons (105,403 t) and the Austrians sank a further 20,020 long tons (20,340 t) while two Pola boats were sunk. [7]