Government-funded social science projects, especially in the field of psychology, increased dramatically during and after World War II. By 1942 the federal government was the leading employer of psychologists, most of whom it coordinated through the Office of Scientific Research and Development. The military employed psychologists to study tactics in psychological warfare and propaganda as well as studying the United States troops themselves. The Office of Strategic Services also cultivated a Psychology Division, directed by Robert Tryon, to study the group behavior of humans for warfare purposes. A memo from William J. Donovan in November 1941 called for collection of information about the personality and social relations of "potential enemies" and for the creation of an intelligence organization "to analyze and interpret such information by applying to it not only the experience of Army and Naval Officers, but also of specialized trained research officials in the relative scientific fields, including technological, economic, financial, and psychological scholars." Research in psychological warfare was widespread, and according to University of Michigan psychologist Dorwin Cartwright, "the last few months of the war saw a social psychologist become chiefly responsible for determining the week-by-week-propaganda policy for the United States government."