The contention of the essay is to develop the dictum that the United States Medical Department recognizes the challenge and opportunity to contribute to the health delivery systems of developing nations. The training of clinical physician assistants by the Army provides a practical, flexible, and essential means to aid health programs in developing nations when the opportunity exists. Maximum utilization of men, money, and materials must be accomplished if the medical department is to meet the challenge of delivering the product of medical knowledge, technology, and expertise to the benefit of the masses of people in developing nations who desire these benefits. (Author)