A survey was made of North Atlantic Treaty Organization (NATO) coordination of training programs for allied military forces and its implications about collaboration among allies in peacetime. Three types of training were analyzed: (1) higher training, or the coordination of large military formations; (2) unit training of smaller teams; (3) specialized individual training. NATO authorities have achieved greatest success with the first type. The forces of the member nations work harmoniously, and combined exercises and maneuvers have steadily increased in number and sophistication. In unit and individual training, however, NATO's role is much more limited, and the nations have preferred to retain separate programs. This lack of collaboration stems, not from ineffectual NATO leadership, but from NATO's legal and economic impotence and the dominance of national self interest. NATO training experiences tend to confirm the utilitarian nature of a nation's behavior in alliances. When national self interest is served (because of scarcity of an essential commodity or strategic necessity) cooperation is engaged in willingly. Where cooperation involves a sacrifice for the common welfare, it is declined. (The document includes 25 references.) (author/ly)