USA HISTORY

Detailed explanation-1: -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-2: -They hoped to break the British stranglehold blockade of crucial German supply ports and knock Britain out of the war within the year. U-boats resumed unrestricted attacks against all ships in the Atlantic, including civilian passenger carriers.

Detailed explanation-3: -Answer and Explanation: The main result of Germany’s use of unrestricted submarine warfare during World War l was the entry of the United States into the conflict. Submarines had been attacking the ships of neutral countries, as well as, ships that carried civilian passengers.

Detailed explanation-4: -After failing to seize control of the sea from the British at the Battle of Jutland in 1916, Germany resumed unrestricted submarine warfare on 1 February 1917. This, coupled with the Zimmermann Telegram, brought the United States into the war on 6 April.