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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.

U-Boat Deck Gun
U-Boat Deck Gun

The deck gun was an important part of a U-Boat's armament.

This one fired 88mm shells and could withstand repeated immersion in corrosive salt water. The wheel on the gun's breech (right) allowed the gun barrel to be raised or lowered quickly. Deck guns would fire warning shots at unescorted merchant ships to get them to stop, and could also sink a ship instead of using the U-Boat's limited number of torpedoes. Although a U-Boat at sea was an unsteady gun platform, the deck gun was a formidable weapon, outclassing the armament of most Royal Canadian Navy vessels.

Breech Loading Naval Gun
CWM 19390002-558

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