For much of the last 25 years, NATO has focused on crisis managementin places such as Kosovo and Afghanistan,resulting in major changes to alliance strategy, resourcing,force structure, and training. Re-embracing collective defense —which lies at the heart of the Treaty of Washington’s Article 5 commitment— is no easy feat, and not something NATO can do through rhetoric and official pronouncements. Nonetheless,this shift is vitally necessary if the alliance is to remain the bulwark of Western defense and security. Russia’s illegal annexation of Crimea and its invasion of Ukraine have fundamentally upended the security environment in Europe, thrusting NATO into the spotlight as the primary collective defense tool most European states rely upon to ensure their security. Collective defense is one of the alliance’s threecore missions, along with crisis management and cooperative security. It is defined in Article 5, the most well-known and arguably most important part of NATO’s founding treaty, which states: “The Parties agree that an armed attack against one or more of them in Europe or North America shall be considered an attack against them all.” Although all three missions are vital to the interests of NATO’s many member states, collective defense has become first among equals once again. However,three very significant hurdles stand in the way of the alliance and its member states as they attempt to re-embrace collective defense. These loosely correspond to an ends-waysmeans construct. First is the alliance's strategy toward Russia. Is Russia an adversary,a partner,neither,or both? How should strategy and policies change to place the alliance and its members on more solid ground when it comes to managing Russia? Second are the ongoing disputes over resourcing and burden-sharing. In recent years, it has become commonplace for American leaders to publicly berate European allies in an effort to garner more contributions to the common defense. How might the alliance better measure and more equitably share security burdens? Third is the alliance’s readiness to fulfill its objectives. Many allies have announced or are implementing increases in defense spending. However, governments of European NATO member states are strongly incentivized by domestic politics to favor acquisition of military hardware or spending on personnel salaries and benefits,usually at the expense of readiness. The result is that NATO military forces risk quickly becoming hollow in a way that is often underappreciated, which will prevent the alliance from fulfilling the collective defense promise inherent in Article 5. The book examines all such questions to assess NATO’s return to collective defense and offer a roadmap for overcoming those challenges in both the short and long-term.

This book builds on the six years of hands-on experience that the author had while working in the North Atlantic Treaty Organization. It provides an overview and history of NATO, looks at the political and military components of the Alliance, as well as the military command from the perspective of real-world contemporary NATO operations and planning. The author also looks at the military training, lessons, and exercise components and how it prepares forces to support upcoming NATO Response Force (NRF) rotations to ensure that NATO is a viable threat deterrent and responsive organization to both Article 5 and non-Article 5 operations. This book will serve as a primer into the world’s longest enduring Alliance and one that has made an impact on real world operations over the last 20 years in Europe (Bosnia and Kosovo), Africa (Libya), Asia (Afghanistan and Pakistan), and the Middle East (Iraq).

A head of title: Council on Foreign Relations, International Institutions and Global Governance Program.

Sayle's book is a remarkably well-documented history of the NATO alliance. This is a worthwhile addition to the growing literature on NATO and a foundation for understanding its current challenges and prospects.― Choice Born from necessity, the North Atlantic Treaty Organization (NATO) has always seemed on the verge of collapse. Even now, some seventy years after its inception, some consider its foundation uncertain and its structure weak. At this moment of incipient strategic crisis, Timothy A. Sayle offers a sweeping history of the most critical alliance in the post-World War II era. In Enduring Alliance, Sayle recounts how the western European powers, along with the United States and Canada, developed a treaty to prevent encroachments by the Soviet Union and to serve as a first defense in any future military conflict. As the growing and unruly hodgepodge of countries, councils, commands, and committees inflated NATO during the Cold War, Sayle shows that the work of executive leaders, high-level diplomats, and institutional functionaries within NATO kept the alliance alive and strong in the face of changing administrations, various crises, and the flux of geopolitical maneuverings. Resilience and flexibility have been the true hallmarks of NATO. As Enduring Alliance deftly shows, the history of NATO is organized around the balance of power, preponderant military forces, and plans for nuclear war. But it is also the history riven by generational change, the introduction of new approaches to conceiving international affairs, and the difficulty of diplomacy for democracies. As NATO celebrates its seventieth anniversary, the alliance once again faces challenges to its very existence even as it maintains its place firmly at the center of western hemisphere and global affairs.

Future NATO looks at the challenges facing NATO in the 21st century and examines how the Alliance can adapt to ensure its continued success For more than 70 years, the North Atlantic Alliance has helped to preserve peace and stability in the Euro-Atlantic area. It has been able to adjust to varying political and strategic challenges. We must ensure that NATO continues to be effective in the future. This requires looking ahead, challenging habitual approaches, exchanging ideas, and advancing new thinking. I highly recommend Future NATO to policymakers, military professionals and scholars alike, as it offers necessary critical and constructive analysis of current and future challenges posed to our security and defence.Annegret Kramp-Karrenbauer, Minister of Defence, Germany Since 1949, NATO has successfully upheld common principles and adapted to new realities. As Future NATO examines, the Alliance is facing a new set of external and internal challenges in the decades to come. The Alliance and its partners need to remain committed to future changes. I recommend this excellent study to all, but especially to the younger generation of scholars and future policymakers. Trine Bramsen, Minister of Defence, Denmark Over the last 70 years, Europe has lived in peace and prosperity because of NATO, with unity as our most important weapon. We may have our differences, but we will continue to work on our common cause to promote peace, security and stability. To effectively do so, NATO needs to continuously adapt to changing security situations. An important current challenge is to ensure European Allies take more responsibility for their security. But we also need to look at future challenges and find innovative solutions for them. Future NATO offers a useful analysis that can help us prepare for what is to come for the Alliance. Ank Bijleveld, Minister of Defence, The Netherlands

The North Atlantic Treaty Organization (NATO) is the world’s largest, most powerful military alliance. The Alliance has navigated and survived the Cold War, the collapse of the Soviet Union, and the post-9/11 era. Since the release of the 2010 Strategic Concept, NATO’s strategic environment has again undergone significant change. The need to adapt is clear. An opportunity to assess the Alliance’s achievements and future goals has now emerged with the Secretary General’s drive to create a new Strategic Concept for the next decade—an initiative dubbed NATO 2030. A necessary step for formulating a new strategic outlook will thus be understanding the future that faces NATO. To remain relevant and adjust to new circumstances, the Alliance must identify its main challenges and opportunities in the next ten years and beyond. This book contributes to critical conversations on NATO’s future vitality by examining the Alliance’s most salient issues and by offering recommendations to ensure its effectiveness moving forward. Written by a diverse, multigenerational group of policymakers and academics from across Europe and the United States, this book provides new insights about NATO’s changing threat landscape, its shifting internal dynamics, and the evolution of warfare. The volume’s authors tackle a wide range of issues, including the challenges of Russia and China, democratic backsliding, burden sharing, the extension of warfare to space and cyberspace, partnerships, and public opinion. With rigorous assessments of NATO’s challenges and opportunities, each chapter provides concrete recommendations for the Alliance to chart a path for the future. As such, this book is an indispensable resource for NATO’s strategic planners and security and defense experts more broadly.

The emergence of the European Security and Defense Policy (ESDP) in the last two-thirds of the 1990s and continuing into the new century, has been a complex process intertwining politics, economics, national cultures, and numerous institutions. This book provides an essential background for understanding how security issues as between NATO and the European Union are being posed for the early part of the 21st century, including the new circumstances following the terrorist attacks in New York and Washington on September 11, 2001. This study should be of interest to those interested in the evolution of U.S.-European relations, especially in, but not limited to, the security field; the development of institutional relationships; and key choices that lie ahead in regard to these critical arrangements.

This open access volume surveys the state of the field to examine whether a fifth wave of deterrence theory is emerging. Bringing together insights from world-leading experts from three continents, the volume identifies the most pressing strategic challenges, frames theoretical concepts, and describes new strategies. The use and utility of deterrence in today’s strategic environment is a topic of paramount concern to scholars, strategists and policymakers. Ours is a period of considerable strategic turbulence, which in recent years has featured a renewed emphasis on nuclear weapons used in defence postures across different theatres; a dramatic growth in the scale of military cyber capabilities and the frequency with which these are used; and rapid technological progress including the proliferation of long-range strike and unmanned systems. These military-strategic developments occur in a polarized international system, where cooperation between leading powers on arms control regimes is breaking down, states widely make use of hybrid conflict strategies, and the number of internationalized intrastate proxy conflicts has quintupled over the past two decades. Contemporary conflict actors exploit a wider gamut of coercive instruments, which they apply across a wider range of domains. The prevalence of multi-domain coercion across but also beyond traditional dimensions of armed conflict raises an important question: what does effective deterrence look like in the 21st century? Answering that question requires a re-appraisal of key theoretical concepts and dominant strategies of Western and non-Western actors in order to assess how they hold up in today’s world. Air Commodore Professor Dr. Frans Osinga is the Chair of the War Studies Department of the Netherlands Defence Academy and the Special Chair in War Studies at the University Leiden. Dr. Tim Sweijs is the Director of Research at The Hague Centre for Strategic Studies and a Research Fellow at the Faculty of Military Sciences of the Netherlands Defence Academy in Breda.

In NATO Rules of Engagement, Camilla Guldahl Cooper offers clarity on a topic prone to confusion and misunderstanding. NATO rules of engagement (ROE) are of considerable political, strategic and operational importance, yet many of its concepts lack clarity. The resulting ambiguity may be detrimental for people involved and for mission accomplishment. Through a thorough analysis of the concept, purpose, development and use of NATO ROE, Cooper contributes to improved understanding and implementation of NATO ROE. The book covers all use of force categories and relevant law relating to the use of force during armed conflicts, including the complex concepts of hostile act and hostile intent, direct participation in hostilities, and the increasing reliance on self-defence during armed conflict.