The U-Boats...a thorn in our side

        The Battle of the Atlantic was the single longest campaign in the entire war, lasting nearly the entire duration. Germany's goal was to cut off shipping lanes from Canada to Britain. Close the the beginning of the war, the Germans were doing a vary good job of keeping North American supply trips from Europe. They used submarines and put them into groups call "wolfpacks". They even invaded Canadian waters in the St. Lawrence River. The allies would soon need to find a way to either evade of eradicate the U-boats in the atlantic.