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First World War (1914-1918)
The U-Boat Menace

The emergence of the submarine was a major development in naval warfare. German submarine - or U-Boat - attacks against Allied shipping in the Atlantic and in European waters posed a major threat to the Allied war effort.

HMHS Llandovery Castle
HMHS Llandovery Castle

A group of passengers, mostly Canadian soldiers, pose for a photograph on board the Canadian hospital ship HMHS Llandovery Castle on 26 May 1918.

Just over a month later, the German submarine U-86 torpedoed and sank the well- marked hospital ship, which had been carrying civilians, nurses, and wounded soldiers, off the Irish coast. The sub then rammed the ship's lifeboats and machine-gunned survivors in the water. Fourteen Canadian nursing sisters were among the 234 dead from the Llandovery Castle; only 24 people survived.

George Metcalf Archival Collection
CWM 20070096-010

The Return of U-9
U-Boat Deck Gun
Periscope Lens, U-117
U-Boat Signalling Lamp
Cut-Away German U-Boat Mine
German Naval Mine, U-153
SS Audax Sinking
Life Ring, SS Brussels
Life Ring, UC-77
"We risk our lives to bring you food. It's up to you not to waste it."
Porthole, RMS Lusitania
Qu'importe l'existence des Neutres! L'Allemagne est au dessus de tout! (Neutrality is irrelevant! Germany sees herself above all else!)
HMHS Llandovery Castle
Depth Charge, "Type G"
Model, U-27
First World War Atlantic Convoy
German Submarine U-118