In the future, some of our most formidable threats will be those that are masters of exploiting and manipulating social and political foundations on an international level. MG John Robinson recently noted: "For international decisions to have lasting meaning in the world, they must be made in concert with the other nations of this earth. The U.S. has learned that there are limits to what it can do alone."¹ Future world stability will be dependent on the ability of nations to rapidly unite contingent multinational forces which can interact cohesively on the battlefield. Training will be a major factor in preparing for such joint international military operations. This paper will expand on the current interest and requirements for coordinated multinational training. Primary emphasis will be on the issues and challenges involved in achieving international interoperability including: technical requirements such as interface standards and correlated databases; philosophical issues such as differences in training ideologies; political implications such as national security; and management challenges.