This is a thoughtful survey, of great interest to the clinical psychiatrist, the military planner, to those interested in public health and to those concerned with medical education. One is startled afresh to read that there were one million admissions to neuropsychiatric services in army hospitals between 1941 and 1946, and that three men received psychiatric help outside a hospital for every one who entered the hospital. Menninger considers group treatment, narcotherapy and elaborately organized hospital activities the three outstanding therapeutic contributions of army experience. He stresses the lack of dependable criteria for determining the soldier's threshold of tolerance of emotional trauma and indicates the forces which enabled men to function under conditions of great stress: effective leadership, indentification with the group, conviction of the importance of the job. Some of the lacks in military psychiatry are touched on briefly.