In 1916, the ship was placed in reserve, though she quickly returned to service when

the United States entered World War I in April 1917.

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During the war, she trained naval personnel; while cruising off the eastern coast of the United States

in September 1918,

she struck a naval mine laid by a German U-boat.

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The extensive damage required lengthy repairs that kept her out of service for the rest of the war.

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She helped to return American soldiers from Europe in 1919 before resuming her training ship duties in 1920–21