U-109 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-109, a Type U 93 submarine launched in 1917 that served in the First World War and sank in 1918
- During the First World War, Germany also had this submarine with a similar name:
- SM UB-109, a Type UB III submarine launched in 1917 and sank in 1918
SM UB-109 was a German Type UB III submarine or U-boat in the German Imperial Navy during World War I. She was commissioned into the German Imperial Navy on 31 December 1917 as SM UB-109.
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-109 (1940), a Type IXB submarine that served in the Second World War and sank in 1943
SM U-109 was a Type U 93 submarine of the Imperial German Navy in World War I, taking part in the First Battle of the Atlantic. The building contract was confirmed 5 May 1916, and was awarded to Germaniawerft, Kiel. A Type 93 boat, she was launched 25 September 1917 and commissioned 7 November. She was under the command of Otto Ney. On 28 January 1918, she was sunk in the English Channel, possibly by a mine, while diving to avoid ships from the Dover Patrol. She sank no ships.
Type 93 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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