How did the zimmerman note affect WWI

The Zimmermann Telegram, or Note, was significant to the history of World War I because it forced United States President Woodrow Wilson to reverse his initial position on American involvement in the European conflict and commit the United States to the war against Germany.

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The note revealed a plan to renew unrestricted submarine warfare and to form an alliance with Mexico and Japan if the United States declared war on Germany. The message was intercepted by the British and passed on to the United States; its publication caused outrage and contributed to the U.S. entry into World War I

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b.unemployment reached nearly 25 percent.

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