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Why did the United States join World War I on the side of the Allies against German?

User Paulus
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Answer:

Germany's resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson's decision to lead the United States into World War I.

User Josh Alecyan
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Answer:

The United States later declared war on German ally Austria-Hungary on December 7, 1917. Germany's resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson's decision to lead the United States into World War I.

Step-by-step explanation:

User JustBeingHelpful
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