Although the Department of National Security and Strategy, U.S. Army War College, uses several of the chapters in this volume as readings for its core course "War, National Policy and Strategy," this is not a textbook. It does reflect, however, both the method and manner used to teach strategy formulation to America's future senior leaders. However, the book is not a comprehensive or exhaustive treatment of either strategy or the policymaking process. It is organized in broad groups of chapters addressing general subject areas. We begin with a look at some specific issues about the general security environment—largely international. The section on strategic thought and formulation includes chapters on broad issues of strategy formulation as well as some basic strategic theory. The third section is about instruments of national power, and the final section deals with selected issues about the U.S. national security policymaking process.