World War I Causes and US Entry · US History

The Battle of the Argonne Forest was significant for U.S. history because it was:

  1. The first time the U.S. used tanks in combat
  2. A massive Allied offensive that broke the German lines and led to the armistice
  3. The site in northern France where the Zimmermann Telegram was allegedly discovered by soldiers
  4. The battle that convinced the U.S. to stay out of the war in 1914
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Correct answer: A massive Allied offensive that broke the German lines and led to the armistice

As the largest and bloodiest operation of the AEF, it lasted 47 days and involved 1.2 million American soldiers. The victory pushed German forces back to their own border, ending their ability to continue the war.

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