This authoritative review of the psychiatric problems in the army during the recent war manages in a brief space to cover the statistics and overall picture of military neuropsychiatry. The magnitude of the job emerges even from the barest description of the work done and receives further amplification from Menninger's clear and pointed observation. Although so many aspects of organizational and clinical experience are reviewed in these few pages, place is still found for some remarkably penetrating comments on psychopathology. 'We learned that maintenance of mental health was largely a function of leadership which included the extremely important element of motivating the man to want to do his job and remain loyal to his associates and his unit.' Environment rather than personality make-up or internal psychogenic stresses was of paramount importance in the breakdown of the individual and played a major rôle in treatment. Menninger emphasizes the need to organize psychiatry on a broad social scale, underlines the lessons to be drawn from the unprecedented mass