In order to develop successful selection procedures, training materials, and management policies for military assistance program (MAP) advisers, the conditions under which they work were analyzed, including identifying the culturally determined preferences counterparts have for the people with whom they wish to work, and the extent to which advisors and counterparts satisfy what each regards as critical role behaviors of the other. U.S. Army advisory personnel assigned to the U.S. Army Advisory Group, Korea (KMAG) and counterparts in the Republic of Korea Army (ROKA) were surveyed in the summer and fall of 1966. Through rating scales and questionnaires, observations were made of the kinds of personalities with whom advisors and counterparts most preferred to work. In addition, advisors and counterparts judged one another in terms of a large number of role behaviors previously identified as important.