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World War II
United States Merchant Marine. A fleet of civilian ships serving in US territorial waters, the merchant marine becomes a naval auxiliary in time of war.
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.