| To 
maintain its war effort, Britain imported 
enormous quantities of supplies by sea. 
If the Germans sank Allied merchant ships 
transporting weapons, raw materials, 
and food at a faster rate than this shipping 
could be replaced, then Britain would 
slowly lose the ability to wage war. 
This struggle was known as the ‘Battle 
of the Atlantic’. Halifax was the 
main port on the east coast of North 
America where merchant ships formed into 
convoys, groups of merchant vessels that 
sailed together for the hazardous trans-Atlantic 
crossing. Germany 
nearly won this war at sea but, in May 
1943, after suffering severe losses to 
Allied warships and aircraft, the Germans 
withdrew most of their U-boats from the 
mid-Atlantic. Throughout the war, the 
Royal Canadian Navy (R.C.N.), the Canadian 
Merchant Navy, and the immense output 
of Canadian industry proved vital in 
the costly Allied victory. See also :Canadian
Newspapers and the Second World War : The Battle of the Atlantic
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