In the past decade, numerous military operations by outside states have relied on the real or alleged 'invitation' of one of the parties. In this book, three experts examine the relevant legal issues, from sovereignty to the scope and relevance of consent, the use of force to the role of the Security of Council. Using critical historical analysis, qualitative case studies and large-N empirics, these topics are debated and addressed in a unique trialogue format. Accommodating the pluralism of the field, the trialogical setting highlights the divergences and commonalities of each of the three approaches. Benefiting from an in-depth analysis of recent cases of armed intervention and the diversity of the authors' perspectives, this collection is key to developing a richer understanding of the law of military intervention. This title is also available as Open Access on Cambridge Core.

‘This new addition to the Max Planck Trialogues series on the Law of Peace and War is both significant and timely. Corten, Fox and Kritsiotis provide a commendably comprehensive and measured treatment of what has until recently been a relatively overlooked topic of academic interest, but one with real world importance.’

Christian Henderson - University of Sussex

‘The question of armed intervention and consent has received increasing attention in recent years, and rightly so. This book, however, is unique in bringing together three leading international lawyers to tackle this vexing issue from different theoretical perspectives. Along with the expertly written introduction, the contributions in this book are a must-read for anyone seeking to understand the problem of intervention and consent in all of its complexity.’

Eliav Lieblich - Tel Aviv University

‘This book provides a thorough, meticulously researched compilation of law on the issue of foreign military intervention on request, approached from three distinct perspectives. Given that states repeatedly use, and misuse, the doctrine, clarifying and solidifying this body of law is of crucial importance. This volume provides a welcome contribution.’

Jennifer Trahan - NYU Center for Global Affairs

‘Faithful to its professed ‘multiperspectivist’ approach, this volume is another gem in the Trialogue Series. Three leading academic voices shed light on the ever-problematic doctrine of military assistance on request, critically examining practice related to third-State interventions in situations of civil war, and exploring the role of the Security Council in validating such conduct. A must-read for jus ad bellum aficionados.’

Tom Ruys - Ghent Rolin-Jaequemyns International Law Institute (GRILI), Ghent University