When the United States entered World War II in 1941, the psychiatric lessons gleaned from World War I had been forgotten and thus had to be relearned. The William H. White Foundation, a psychoanalytic group in Washington, D.C., with Harry Stack Sullivan, M.D., proposed guidelines for Army inductees that were later modified by the Selective Service System. APA became actively involved. A neuropsychiatric unit in the surgeon general’s office was again activated, with Roy Halloran, M.D., and later William Menninger, M.D., in charge.