U-135 may refer to one of the following German submarines:
Germany, officially the Federal Republic of Germany, is a country in Central and Western Europe, lying between the Baltic and North Seas to the north, and the Alps to the south. It borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, France to the southwest, and Luxembourg, Belgium and the Netherlands to the west.
- SM U-135, a Type U 127 submarine launched in 1917 and that served in the First World War until surrendered on 20 November 1918; grounded on east coast of England on way to be broken up in 1921
- During the First World War, Germany also had this submarine with a similar name:
- SM UB-135, a Type UB III submarine ordered in 1917 but not completed by the end of the war
The Type UB III submarine was a class of U-boat built during World War I by the German Imperial Navy.
- During the First World War, Germany also had this submarine with a similar name:
- German submarine U-135 (1941), a Type VIIC submarine that served in the Second World War until sunk 15 July 1943
SM U-135 was a German Type U 127 U-boat of the Imperial German Navy during World War I. Built at the Kaiserliche Werft Danzig, the U-boat was laid down on 4 November 1916, launched on 8 September 1917 and commissioned 20 June 1918.
Type U 127 submarine was a class of U-boats built during World War I by the Kaiserliche Marine.
World War I, also known as the First World War or the Great War, was a global war originating in Europe that lasted from 28 July 1914 to 11 November 1918. Contemporaneously described as "the war to end all wars", it led to the mobilisation of more than 70 million military personnel, including 60 million Europeans, making it one of the largest wars in history. It is also one of the deadliest conflicts in history, with an estimated nine million combatants and seven million civilian deaths as a direct result of the war, while resulting genocides and the 1918 influenza pandemic caused another 50 to 100 million deaths worldwide.
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