The Army Behind the Army by E. Alexander Powell is a historical account written in the early 20th century. It explores the often unseen services and technologies that sustained the American Expeditionary Forces in World War I—especially communications, engineering, transportation, and other logistical arms. The focus is on how specialists and technicians, rather than front-line troops alone, made large-scale modern warfare possible. The opening of the volume recasts the Signal Corps as the army’s “nerve-system,” replacing the flag-waving myth with telephones, radios, pigeons, runners, panels, lamps, and an extensive wire network. Powell outlines the corps’ rapid expansion, its recruitment of U.S. telephone talent (including female operators), the creation of color-coded outpost wire, and secrecy tools like buzzerphones and twisted-pair lines. He highlights listening-posts that tapped enemy currents, radio-intercept and direction-finding teams that mapped German nets and even staged a deceptive “false corps net,” and the reliability and heroism of carrier pigeons when every other link failed. A photographic branch—air and ground—trained specialists to map, report, teach, and buoy morale with films that countered enemy propaganda. The section closes with striking innovations: radiotelephony with aircraft, multiplexing many calls over a single wire, trees used as natural radio antennae, and a practical, unbreakable cipher-transmission device. The narrative then turns to the Engi…
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