The Waldeck-Rousseau was an armoured cruiser of the French Navy

French Navy

The French Navy, officially the Marine nationale and often called La Royale is the maritime arm of the French military. It includes a full range of fighting vessels, from patrol boats to a nuclear powered aircraft carrier and 10 nuclear-powered submarines, four of which are capable of launching...

.

On 18 October 1914, off Kotor

Kotor

Kotor is a coastal city in Montenegro. It is located in a secluded part of the Gulf of Kotor. The city has a population of 13,510 and is the administrative center of the municipality....

, she fought against the Austro-Hungarian

Austria-Hungary

Austria-Hungary , more formally known as the Kingdoms and Lands Represented in the Imperial Council and the Lands of the Holy Hungarian Crown of Saint Stephen, was a constitutional monarchic union between the crowns of the Austrian Empire and the Kingdom of Hungary in...

 U-boat

U-boat

U-boat is the anglicized version of the German word U-Boot , itself an abbreviation of Unterseeboot , and refers to military submarines operated by Germany, particularly in World War I and World War II...

and aircraft. In August 1916, she battled another submarine.

She was put in the reserve in 1924, and reactivated in April 1929 until 1931. She was decommissioned once again in 1932, and used as a hulk from 16 June 1936.

She was dismantled between 1941 and 1944.