The Allies, including Great Britain, USA, Russia and Italy all had submarines during WW1. In general they were not nearly as advanced or successful as the German U-boats.
Sinking civilian ships without warning (un-restricted submarine warfare).
USS Sea Devil
uss narwhal
Germany didn't declare war on the US in world war 1. It was the US that declared war on Germany on April 6th 1917 as a result of the unrestricted submarine war introduced by Germany in January that year. - I Warner
The first US draft was the US Civil War (1861-1865); the last US draft was the Vietnam War (1961-1975).
Only one US submarine sank in World War One.
Submarine Warfare
by Gerrnan submarine
by Gerrnan submarine
A submarine sunk the liner 'Lusitania'. Many Americans died. USA was horrified, declared war on Germany.
Germany's unrestricted submarine warfare
submarine
Yes. The Chicagoans(or the United States Navy) have captured the World War two German submarine and it was brought into Chicago in the year 1956 but now that kind of real World War two combat submarine is for display.
The US was oficcially neautral in world war two until 1917 when they declared war on Germany. Prior to this the US had supported Britain, despite being officially neutral. This led to Germanys use of unrestricted submarine warfare and the sinking of the Lusitania.
No
1. Unrestricted Submarine Warfare 2. Sinking of several US ships
Germany's unrestricted submarine warfare