Final answer:
In 1917, Congress voted to go to war against the Allied Powers in World War I.
Explanation:
Congress voted to go to war against the Allied Powers in 1917. The United States entered World War I to support the Allies, including countries like France, Britain, and Russia. This decision marked a significant shift in the U.S.'s foreign policy at the time.
Learn more about Congress decision to go to war in World War I here:
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