Lieber Studies Volume 13

Armed Conflict and International Law in the Indo-Pacific Region provides a timely and regionally grounded analysis of how international law applies to potential armed conflict in one of the world’s most strategically dynamic regions. Adopting a multi-domain approach, the volume explores the legal frameworks governing warfare across land, sea, air, space, cyber, and the information environment, while remaining attuned to the Indo-Pacific’s evolving geopolitical landscape.

Part I addresses foundational legal questions that may arise during any future conflict in the Indo-Pacific, including civilian protection, the law of neutrality, and the role of international law more broadly. Part II examines the legal rules guiding military operations in key domains of warfare: air, space, cyber, and the information environment. It also considers the maritime domain, highlighting the law applicable to auxiliary vessels and the weaknesses of the legal regime protecting undersea cables. Part III examines the legal implications of deepening regional cooperation, focusing on alliance politics, capability sharing, and legal interoperability, including a detailed analysis of the AUKUS security partnership. Part IV presents a focused case study on the legal issues that would arise in the event of a conflict over Taiwan.

Bringing together contributions from military legal advisors, academic experts, and humanitarian practitioners, Armed Conflict and International Law in the Indo-Pacific Region combines analytical depth with practical insight. It fills a critical gap in existing scholarship, offering a comprehensive and forward-looking account of the legal challenges posed by future conflict in the Indo-Pacific.

Foreword
Rear Admiral Mathew Williams, MNZM
Introduction
Douglas Guilfoyle and Jennifer Maddocks
PART I: Overarching Challenges in Contemporary Conflict
1. Large Scale Combat Operations in the Indo-Pacific – Practical Implications for International Law
J.J. Merriam
2. Reducing the Human Cost of Large-Scale Military Operations
Abby Zeith and Lakmini Seneviratne
3. Applying the Law of Neutrality in an Indo-Pacific Armed Conflict
Raul (Pete) Pedrozo
PART II: Legal Challenges in Multi-Domain Operations
4. Interpretative Choice and Risk in Indo-Pacific Air Domain Challenges
Angeline Lewis
5. Key Legal Issues in Multi-Domain Operations in the Indo-Pacific: The Space Domain
Theodore T. Richard
6. Key Legal Issues in Multi-Domain Operations in the Indo-Pacific: The Cyber Domain
Lauren M. Cherry
7. Calling Up (And Creating) Auxiliaries: The Use of Merchant Ships for Transport and Logistics
Rob McLaughlin
8. The Protection of Submarine Cables and Pipelines in Armed Conflict in the Indo-Pacific
Atsuko Kanehara
9. Winning the Information War: The Law of Armed Conflict and Public Opinion in the Indo-Pacific
Aurel Sari
PART III: Alliances, Partnerships, and Capability Development
10. Mutual Defense Treaties and Defense Groupings in the Indo-Pacific Region: An Introduction
Erika de Wet
11. The Enhanced Defense Cooperation Agreement in Context: The Perspective from the Philippines
Jay L. Batongbacal
12. AUKUS and Nuclear Submarines: Regional and NPT Implications
Monique Cormier
13. AUKUS Pillar 2: Legal Implications of Sharing Advanced Technology
Natalia Jevglevskaja
PART IV: Case Study: Conflict on Taiwan
14. The Status of Taiwan and its Right to Collective Self-Defense
Peter A. Dutton
15. Taiwan’s Statehood and the Right of Collective Self-Defense: A Taiwanese Perspective
Anne Hsiu-An Hsiao
16. Application of the Geneva Conventions and POW Status in a Conflict in Taiwan
Emily Crawford
17. Weak Legal Guardrails: The United States and the Use of Nuclear Weapons in Great Power Conflict in the Indo-Pacific
Brian Finucane
Index

Authors
Douglas Guilfoyle
Jennifer Maddocks