After the United States entered World War I in 1917, Spencer was posted to San Diego as the first commanding officer of a training base in Coronado, known as Naval Air Station North Island ; they remained there until 1921.

After the United States entered World War I in 1917, Pope took a job in the Personnel Division of the War Department ’ s General Staff in Washington, D. C.

After the United States entered World War I in 1917, the country's railways proved inadequate to the task of supplying the nation's war effort.

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