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. Germany also believed that the United States had jeopardized its neutrality by acquiescing to the Allied blockade of Germany.
Declaration of Independence
The Zimmerman telegraph, was a telegraph from Germany to Mexico proposing an alliance in which Germany would give the land that Mexico lost to the United States if the Mexican people would fight the United States and keep them out of the war
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