Which of these events led to the United States becoming involved in World War 1?

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19 February, 22:08

Which of these events led to the United States becoming involved in World War 1?

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Polo · Answer 1

In 1917, Germany, determined to win its war of attrition against the Allies, announced the resumption of unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American liner Housatonic was sunk by a German U-boat.