In an increasingly contested Indo-Pacific, the United States, Australia and their regional allies and partners face a myriad of strategic challenges that cut across every level of the competitive space. Driven by China’s use of multidimensional coercion in pursuit of its aim to displace the United States as the region’s dominant power, a new era of strategic competition is unfolding. At stake is the stability and character of the Indo-Pacific order, hitherto founded on American power and longstanding rules and norms, all of which are increasingly uncertain. The challenges that Beijing poses the region operate over multiple domains and are prosecuted by the Chinese Communist Party through a whole-of-nation strategy. In the grey zone between peace and war, tactics like economic coercion, foreign interference, the use of civil militias and other forms of political warfare have become Beijing’s tools of choice for pursuing incremental shifts to the geostrategic status quo. These efforts are compounded by China’s rapidly growing conventional military power and expanding footprint in the Western Pacific, which is raising the spectre of a limited war that America would find it difficult to deter or win. All of this is taking place under the lengthening shadow of Beijing’s nuclear modernisation and its bid for new competitive advantages in emerging strategic technologies. Strengthening regional deterrence and counter-coercion in light of these challenges will require the United States and Australia — working independently, together and with their likeminded partners — to develop more integrated strategies for the Indo-Pacific region and novel ways to operationalise the alliance in support of deterrence objectives. There is widespread support for this agenda in both Washington and Canberra. As the Trump administration’s 2018 National Defense Strategy makes clear, allies provide an “asymmetric advantage” for helping the United States deter aggression and uphold favourable balances of power around the world. Australia’s Minister for Defence Linda Reynolds mirrored this sentiment in a major speech in Washington last November, observing that “deterrence is a joint responsibility for a shared purpose — one that no country, not even the United States, can undertake alone.” Forging greater coordination on deterrence strategy within the US-Australia alliance, however, is no easy task, particularly when this undertaking is focussed on China’s coercive behaviour in the Indo-Pacific. Although Canberra and Washington have overlapping strategic objectives, their interests and threat perceptions regarding China are by no means symmetrical. Each has very different capabilities, policy priorities and tolerance for accepting costs and risks. Efforts to operationalise deterrence must therefore proceed incrementally and on the basis of robust alliance dialogue. To advance this process of bilateral strategic policy debate, the United States Studies Centre and Pacific Forum hosted the second round of the Annual Track 1.5 US-Australia Deterrence Dialogue in Washington in November 2019, bringing together US and Australian experts from government and non-government organisations. The theme for this meeting was “Operationalising Deterrence in the Indo-Pacific,” with a focus on exploring tangible obstacles and opportunities for improving the alliance’s collective capacity to deter coercive changes to the regional order. Both institutions would like to thank the Australian Department of Defence Strategic Policy Grants Program and the US Defense Threat Reduction Agency for their generous support of this engagement. The following analytical summary reflects the authors’ accounts of the dialogue’s proceedings and does not necessarily represent their own views. It endeavours to capture, examine and contextualise a wide range of perspectives and debates from the discussion; but does not purport to offer a comprehensive record. Nothing in the following pages represents the views of the Australian Department of Defence, the US Defense Threat Reduction Agency or any of the other officials or organisations that took part in the dialogue.

As countries in the Indo-Pacific seek to manage the challenges posed by China's growing power and assertiveness, they are increasingly relying on minilateral groupings and emphasizing deterrence to maintain regional peace. The essays in this Asia Policy roundtable address the resulting question: can minilateral groupings deter coercion and aggression in the Indo-Pacific and, if so, under what conditions?

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.

The United States faces an unprecedented challenge: simultaneously deterring large-scale conventional aggression by two nuclear-armed powers. Effective simultaneous deterrence requires the United States to reembrace the basic principles of deterrence to reverse unfavorable trends in military power that are eroding long-standing U.S. warfighting advantages. It necessitates U.S. forces to project power into far-flung regions that are contested by China and Russia to uphold America’s extended deterrence commitments to its allies and partners. To do so, the Pentagon must shift from previous approaches designed to deter opportunistic aggressors and respond to crises. While the U.S. Department of Defense (DoD) has realigned its strategy to focus on great-power deterrence, it has faced hurdles in strategy implementation that have stymied changes needed to organize more effectively for simultaneous deterrence. This is due in part to a sizable mismatch between strategy and resources.

Deterring the use of armed force and other forms of coercion is central to the maintenance of order in the Indo-Pacific. Yet from the Taiwan Strait and the South China Sea, to space, cyberspace, and the rules-based order itself, deterrence is becoming increasingly difficult to sustain in the face of major power competition, new grey zone challenges, emerging military technologies, and a rapidly shifting regional balance of power. The United States and Australia are determined to offset these trends by pursuing more integrated strategies for the Indo-Pacific. In recent months, the Trump administration has emphasised long-term strategic competition with China, placing renewed focus on technological dominance, geoeconomic statecraft, nuclear modernisation, and military readiness. In Australia, concerns over Chinese strategic policy, foreign interference, and the durability of American power and leadership have sharpened the focus on collective security and whole-of-government approaches to regional strategy. To advance a robust bilateral policy debate about the key role of deterrence in Indo-Pacific strategy, the United States Studies Centre and Pacific Forum hosted a Track 1.5 US-Australia Indo-Pacific Deterrence Dialogue in Canberra in December 2018. Both institutions thank the Australian Department of Defence and the Carnegie Corporation of New York for their generous support of this initiative. The following summary reflects the authors’ accounts of the dialogue proceedings and does not necessarily reflect their personal views. Nothing in the following pages represents the opinion of the Australian Department of Defence or any other officials or institutions that took part in the dialogue.

In an era of great power competition, the role of alliances in managing escalation of conflict has acquired renewed importance. Nuclear weapons remain the ultimate means for deterrence and controlling escalation, and are central to US alliances in Europe and the Indo-Pacific. However, allies themselves need to better prepare for managing escalation in an increasingly challenging geostrategic and technological environment for the US and its allies. While the challenge of great power competition is acute at both ends of Eurasia, adversary threats, geography and the institutional context of US alliances differ. This book brings together leading experts from Europe, Northeast Asia, the United States and Australia to focus on these challenges, identify commonalities and differences across regions, and pinpoint ways to collectively manage nuclear deterrence and potential escalation pathways in America’s 21st century alliances. ‘Nuclear weapons play an important role in deterrence and preventing military conflict between great powers, while also posing an existential threat to humanity. It is vital that we have a nuanced understanding of this important challenge, so that such weapons are never used. This book offers many important perspectives and makes a significant contribution to the overall debate about these powerful weapons.’ — The Hon Julie Bishop, Chancellor, The Australian National University, Former Foreign Minister of Australia ‘This timely book identifies a wide range of challenges US alliances both in the Indo-Pacific and Euro-Atlantic face as they seek to ensure the value of US extended deterrence, particular the US nuclear umbrella, against China and Russia. This unique collection of chapters written by experts in US allies in both regions presents widely varying security perceptions and priorities. To understand such differences is the key to globally strengthen the US alliance systems, which are a significant advantage Washington enjoys over the two competitors.’ — Yukio Satoh, former President of The Japan Institute of International Affairs (JIIA) ‘This is a timely and thoughtful collection of essays that should serve to jumpstart public discussion and debate—the absence of which is widely noted and much bemoaned. Each contributor examines an aspect of the complicated, multifaceted nuclear debate by discussing the range of dilemmas from deterrence to disarmament. The various views set out here are more relevant than ever as Russia, China and the United States flex their nuclear muscles in new and sometimes dangerous ways. This book should be read by anyone interested in the preventing the use of nuclear weapons and understanding complexities of alliances in an increasingly dangerous world.’ — Madelyn Creedon, former Principal Deputy Administrator of the US National Nuclear Security Administration and Assistant Secretary of Defense for Global Strategic Affairs

Drawing on Chinese military writings, this report finds that China’s strategic-deterrence concepts are evolving in response to Beijing’s changing assessment of its external security environment and a growing emphasis on protecting its emerging interests in space and cyberspace. China also is rapidly closing what was once a substantial gap between the People’s Liberation Army’s strategic weapons capabilities and its strategic-deterrence concepts.