U-100 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-100, a Type U 57 submarine launched in 1917 and that served in the First World War until surrendered on 27 November 1918; broken up at Swansea in 1922
- During the First World War, Germany also had these submarines with similar names:
- SM UB-100, a Type UB III submarine launched in 1918 and surrendered on 22 November 1918; broken up at Dordrecht in 1922
- SM UC-100, a Type UC III submarine launched in 1918 and surrendered on 22 November 1918; broken up at Cherbourg in July 1921
SM UC-100 was a German Type UC III minelaying submarine or U-boat in the German Imperial Navy during World War I.
Type UC III minelaying submarines were used by the Imperial German Navy during World War I. They displaced 474 tonnes at the surface and 571 t submerged, carried guns, 7 torpedoes and up to 14 mines. The ships were double-hulled with improved range and sea-keeping compared to the UC II type. The type had better seagoing, maneuvering and turning capabilities than its predecessor, while underwater stability was reduced.
SM UB-100 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 17 September 1918 as SM UB-100.
The Type UB III submarine was a class of U-boat built during World War I by the German Imperial Navy.
Dordrecht, colloquially Dordt, historically in English named Dort, is a city and municipality in the Western Netherlands, located in the province of South Holland. It is the fourth-largest city of the province, with a population of 118,450. The municipality covers the entire Dordrecht Island, also often called Het Eiland van Dordt, bordered by the rivers Oude Maas, Beneden Merwede, Nieuwe Merwede, Hollands Diep, and Dordtsche Kil. Dordrecht is the largest and most important city in the Drechtsteden and is also part of the Randstad, the main conurbation in the Netherlands. Dordrecht is the oldest city in Holland and has a rich history and culture.
- During the First World War, Germany also had these submarines with similar names:
- German submarine U-100 (1940), a Type VIIB submarine that served in the Second World War until sunk on 17 March 1941
SM U-100 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-100 was engaged in the German campaign against Allied commerce (Handelskrieg) during that conflict.
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.
Swansea, is a coastal city and county, officially known as the City and County of Swansea in Wales. Swansea lies within the historic county boundaries of Glamorgan and the ancient Welsh commote of Gŵyr on the southwest coast. The county area includes Swansea Bay and the Gower Peninsula. Swansea is the second largest city in Wales and the twenty-fifth largest city in the United Kingdom. According to its local council, the City and County of Swansea had a population of 241,300 in 2014. The last official census stated that the city, metropolitan and urban areas combined concluded to be a total of 462,000 in 2011; the second most populous local authority area in Wales after Cardiff.
  | This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists. |