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[1] Unlike the earlier Type U-151 submarines (originally designed as merchant submarines to evade naval blockades ), the Type 139 was designed from the outset for combat service. Four bow and two stern torpedo tubes were fitted, but the main armament was the two 15 cm deck guns, which could be laid on target by a rangefinder on the aft section ...
SM U-139 was the lead ship of her class, one of the submarines serving in the Imperial German Navy in World War I. She was commissioned on 18 May 1918 under the command of Lothar von Arnauld de la Perière, who named the submarine Kapitänleutnant Schwieger, after Walther Schwieger, who had sunk the Lusitania in 1915. She only sailed on one war ...
During the First World War, Germany also had this submarine with a similar name: SM UB-139 , a Type UB III submarine laid down but unfinished at the end of the war; broken up on the slip in 1919 German submarine U-139 (1940) , a Type IID submarine that served in the Second World War until scuttled on 2 May 1945; wreck broken up at later date
This list of military engagements of World War I covers terrestrial, maritime, and aerial conflicts, including campaigns, operations, defensive positions, and sieges. Campaigns generally refer to broader strategic operations conducted over a large bit of territory and over a long period of time.
The cruiser submarine concept originated during the unrestricted submarine warfare campaign of 1917.Three German Type U 139 submarines and seven former merchant submarines, each armed with two 15-centimetre (5.9 in) guns, patrolled areas distant from their North Sea bases to sink Allied merchant shipping as part of an effort to end World War I by starving the United Kingdom of Great Britain ...
Naval warfare in World War I was mainly characterised by blockade. The Allied powers, with their larger fleets and surrounding position, largely succeeded in their blockade of Germany and the other Central Powers, whilst the efforts of the Central Powers to break that blockade, or to establish an effective counter blockade with submarines and commerce raiders, were eventually unsuccessful.
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.
The Encyclopedia of Weapons of World War II. London: Amber Books. ISBN 1-58663-762-2. Bishop, Chris (2014). The Illustrated Encyclopedia of Weapons of World War I. London: Amber Books. ISBN 978-1-78274-141-1. Bullock, David; Deryabin, Alexander (2003). Armored Units of the Russian Civil War: White and Allied. New Vanguard. Oxford: Osprey ...