WORLD WAR I
CAUSES AND COURSE OF THE WAR
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 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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|  |  Britain’s policy to sink ships in German water, no warning! 
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|  |  German policy to sink ships in British water without warning 
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|  |  The U.S. warning of warfare the central powers could expect. 
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|  |  German decision to focus resources on water around Europe. 
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Detailed explanation-1: -Unrestricted submarine warfare was first introduced in World War I in early 1915, when Germany declared the area around the British Isles a war zone, in which all merchant ships, including those from neutral countries, would be attacked by the German navy.
Detailed explanation-2: -How did Germany’s policy of unrestricted submarine warfare anger the American people? American companies lost a lot of money when British ships were sunk. When the Lusitania was sunk, 128 Americans were killed. The American people did not like having goods made in Germany.
Detailed explanation-3: -What was the German policy that called for the sinking of all ships, armed or not, that carried supplies to the Allies? Unrestricted submarine warfare.
Detailed explanation-4: -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.