War is waged not only on battlefields. In the mid-1980s a high-stakes political struggle to redesign the relationships among the president, secretary of defense, Joint Chiefs of Staff, chairman of the Joint Chiefs, and warfighting commanders in the field resulted in the Goldwater-Nichols Act of 1986. Author James R. Locher III played a key role in the congressional effort to repair a dysfunctional military whose interservice squabbling had cost American...