From Deterrence to Engagement provides a comprehensive examination of the U.S.-South Korea defense relationship from 1945 to the present. Using deterrence theory as its framework, this work explores the evolving nature of U.S. interests in a region that became a focal point only after the North Korean invasion in 1950. Author Terence Roehrig addresses the changing nature of the threats to U.S. interests in Korea, especially North Korea's buildup and its efforts to acquire nuclear weapons, and examines specific measures utilized by the United States to implement its deterrence policy. While U.S. policy regarding Korea has changed over the years, this timely and important work argues that although the U.S. commitment to protect its ally has been credible and effective the same cannot be said for its attempts to prevent North Korean nuclear proliferation. From Deterrence to Engagement is certain to find an audience amongst scholars of defense policy, national security, and Korean security relations.

“This is a brilliant and hardheaded book. It will frighten those who prefer not to dwell on the unthinkable and infuriate those who have taken refuge in stereotypes and moral attitudinizing.”—Gordon A. Craig, New York Times Book Review Originally published more than fifty years ago, this landmark book explores the ways in which military capabilities—real or imagined—are used, skillfully or clumsily, as bargaining power. Anne-Marie Slaughter’s new introduction to the work shows how Schelling’s framework—conceived of in a time of superpowers and mutually assured destruction—still applies to our multipolar world, where wars are fought as much online as on the ground.

For decades, the rational actor model served as the preferred guide for U.S. deterrence policy. It has been a convenient and comforting guide because it requires little detailed knowledge of an opponent’s unique decision-making process and yet typically provides confident generalizations about how deterrence works. The model tends to postulate common decision-making parameters across the globe to reach generalizations about how deterrence will function and the types of forces that will be "stabilizing" or "destabilizing." Yet a broad spectrum of unique factors can influence an opponent’s perceptions and his calculations, and these are not easily captured by the rational actor model. The absence of uniformity means there can be very few deterrence generalizations generated by the use of the rational actor model that are applicable to the entire range of opponents. Understanding Deterrence considers how factors such as psychology, history, religion, ideology, geography, political structure, culture, proliferation and geopolitics can shape a leadership’s decision-making process, in ways that are specific and unique to each opponent. Understanding Deterrence demonstrates how using a multidisciplinary approach to deterrence analysis can better identify and assess factors that influence an opponent’s decision-making process. This identification and assessment process can facilitate the tailoring of deterrence strategies to specific purposes and result in a higher likelihood of success than strategies guided by the generalizations about opponent decision-making typically contained in the rational actor model. This book was published as a special issue of Comparative Strategy.

For close to sixty years, the United States has maintained alliances with Japan and South Korea that have included a nuclear umbrella, guaranteeing their security as part of a strategy of extended deterrence. Yet questions about the credibility of deterrence commitments have always been an issue, especially when nuclear weapons are concerned. Would the United States truly be willing to use these weapons to defend an ally? In this book, Terence Roehrig provides a detailed and comprehensive look at the nuclear umbrella in northeast Asia in the broader context of deterrence theory and U.S. strategy. He examines the role of the nuclear umbrella in Japanese and South Korean defense planning and security calculations, including the likelihood that either will develop its own nuclear weapons. Roehrig argues that the nuclear umbrella is most important as a political signal demonstrating commitment to the defense of allies and as a tool to prevent further nuclear proliferation in the region. While the role of the nuclear umbrella is often discussed in military terms, this book provides an important glimpse into the political dimensions of the nuclear security guarantee. As the security environment in East Asia changes with the growth of North Korea's capabilities and China's military modernization, as well as Donald Trump's early pronouncements that cast doubt on traditional commitments to allies, the credibility and resolve of U.S. alliances will take on renewed importance for the region and the world.

The North Korea nuclear crisis needs to be understood comprehensively, taking into account both international relations and the domestic political dynamics of the countries involved. Thus, this thesis analyzes North Korean and U.S. policies by examining their policies in the two nuclear crises (1993-94) and (2002-present) and proposing an improved option for reaching a nuclear-free Korean Peninsula. This thesis finds that North Korea has pursued nuclear weapons with a unique historical, cultural, political background-based strategy as a security mechanism and as a diplomatic tool to help overcome its economic difficulties. Recently it has shown a somewhat more predictable policy toward nuclear issues. In terms of U.S. responses to North Korea's nuclear program, the Clinton administration attempted to modify North Korea's bad behavior with engagement. By contrast, the Bush administration tried to change the Pyongyang regime by adopting a hard-line approach. But, since North Korea's explosive test in October 2006, the United States has engaged again positively with North Korea. The best option to achievement of North Korean denuclearization is to apply multilateral and integrated threat reduction programs in North Korea in a comprehensive manner with responsibility shared by all of the partners in the current Six-Party Talks.

Deterrence as a strategic concept evolved during the Cold War. During that period, deterrence strategy was aimed mainly at preventing aggression against the United States and its close allies by the hostile Communist power centers--the Union of Soviet Socialist Republics (USSR) and its allies, Communist China and North Korea. In particular, the strategy was devised to prevent aggression involving nuclear attack by the USSR or China. Since the end of the Cold War, the risk of war among the major powers has subsided to the lowest point in modern history. Still, the changing nature of the threats to American and allied security interests has stimulated a considerable broadening of the deterrence concept. Post-Cold War Conflict Deterrence examines the meaning of deterrence in this new environment and identifies key elements of a post-Cold War deterrence strategy and the critical issues in devising such a strategy. It further examines the significance of these findings for the U.S. Navy and Marine Corps. Quantitative and qualitative measures to support judgments about the potential success or failure of deterrence are identified. Such measures will bear on the suitability of the naval forces to meet the deterrence objectives. The capabilities of U.S. naval forces that especially bear on the deterrence objectives also are examined. Finally, the book examines the utility of models, games, and simulations as decision aids in improving the naval forces' understanding of situations in which deterrence must be used and in improving the potential success of deterrence actions.