The German submarine U-155 on display in St. Katherine docks, London, England, December 1918. The SM U-155 (formerly merchant submarine “Deutschland”) was a Type U-151 U-Kreuzer of the Kaiserliche Marine during World War I. Built at Flensburger Schiffbau, she was launched on 28 March 1916 as merchant submarine “Deutschland” Deutschland was a blockade-breaking German merchant submarine used during World War I. It was developed with private funds and operated by the North German Lloyd Line.
FIRST WORLD WAR 1914 - 1918 WAR SEA (Q 20220) The crew of a German UC-1 class submarine on deck. Introduced in 1915, the submarines of this class were employed mainly on minelaying duties and carried up to twelve mines. German submarines sank 1,845,000 tons of Allied and neutral shipping between February and April 1917.
U-boats were German submarines that caused havoc in World War Two during the Battle of the Atlantic. U-boats were so damaging that Winston Churchill commented that it was the only time in World War Two that he thought Britain would have to contemplate surrendering.