In the conduct of foreign policy and the participation of the United States in international affairs, the relation between the Navy and the Foreign Service is of vital importance, but often misunderstood. The relationship encompasses the very wide range of coördination and coöperation which should and must exist between the two interdependent government agencies in peace, during times of national emergency, and, finally, when the country is engaged in actual warfare. The relationship involves, as well, the larger problem of national defense, and this cannot be ignored if the United States is to maintain its proper position in world affairs.