HISTORY
WORLD WAR II
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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By disguising warships as cargo ships to reduce the threat of attacks
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By using airplanes to deliver most war materials
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Through the use of improved sonar technology and the convoy system
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Through agreements with Canada, Greenland, and Iceland to provide safe harbors
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Detailed explanation-1: -To combat the submarine threat, the British and U.S. started grouping merchant ships in convoys and protecting them with escorts. Submarine sinkings dropped dramatically. The U.S. Navy helped ensure that tens of millions of tons of supplies reached Europe.
Detailed explanation-2: -The United States later declared war on Austria-Hungary on December 7, 1917. Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 was the primary motivation behind Wilson’s decision to lead the United States into World War I.
Detailed explanation-3: -The threat of unrestricted submarine warfare was met by American insistence on a strategy of escorted convoys backed by the commitment of many ships to the ensuing campaign. The American escorts from Gibraltar alone escorted 10, 478 voyages. There is an American Naval Monument at Gibraltar to commemorate their efforts.
Detailed explanation-4: -During World War II, combination sonar equipments that provided ranging, listening, and sounding were installed on submarines. The model WCA is such a combination sonar equipment. The model WFA sonar equipment, which has torpedo-detection and mine-detection circuits, was developed near the end of World War II.