The entry of the United States into World War I on the side of the Allies was due to several factors;among them were the resumption of unrestricted submarine warfare by the Germans and the:
A)genocide attempted by the Germans on the Eastern Front against the Slavs.
B)enormous debt owed U.S.banks by the Allies that needed to be protected.
C)discovery of a widespread and powerful German "fifth rank" in the United States.
D)victory of the Bolsheviks in Russia and the movement of German troops to the Western Front.
E)interception of the "Zimmerman telegram" sent by Germany's foreign minister to Mexico.

Question

Quizplus · Accepted Answer

The interception of the "Zimmerman telegram" sent by Germany's foreign minister to Mexico was a major factor in the United States' decision to enter World War I on the side of the Allies. The telegram proposed that if Mexico joined the war on Germany's side, Germany would help Mexico recover lost territory in the United States. This alarmed the United States and pushed them towards joining the war effort.

The Entry of the United States into World War I