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Chapter 1: Sanctions And The Shadow Fleet: Terrorism Forfeiture And Operation Economic Fury, James Kraska

International Law Studies

No abstract provided.

Guardians In Orbit: Legal Justifications And Limits Of Defensive Satellite Operations, Yurika Ishii

International Law Studies

The deployment of “bodyguard satellites”—spacecraft designed to autonomously detect and counter hostile space objects—has moved from classified capability development to explicit national security policy across a growing number of States. This article examines the circumstances under which interference with another State’s satellite may be legally justified under international law, analyzing several possible grounds: self-defense under Article 51 of the UN Charter, forcible countermeasures, non-forcible countermeasures, and necessity. Drawing on a survey of national space defense policies, jurisprudence of the International Court of Justice, and the law of State responsibility, the article reaches two principal conclusions. First, across all justificatory frameworks, …

An Exceptional Model At Sea: Functionalist Targeting And The Legal Vulnerability Of Maritime Civil Defense In Japan, Kentaro Furuya

International Law Studies

The intensifying security competition in East Asia, characterized by persistent territorial disputes and the potential for major regional contingencies, has placed the Japan Coast Guard (JCG) at a strategic crossroads. The 2023 Control Guideline, which outlines the JCG’s role during armed attacks, has further heightened interest in the agency’s legal status. This article examines the critical gap between Japan’s domestic legal framework and the international law of naval warfare, specifically addressing how the potential classification of JCG assets as military objectives undermines the safety of maritime civil defense operations.

While the Japanese government firmly maintains the JCG’s status as a …

A Sovereign Peace: Reconceptualizing The Law Of Sovereignty In The Taiwan Strait, Alyssa Resar

International Law Studies

China and Taiwan’s enduring dispute stems from a fundamental disagreement over Taiwan’s sovereignty. Drawing on binary conceptions of sovereignty in international law, the Chinese government argues that there can only be one legitimate Chinese sovereign—and that China is this sovereign. Meanwhile, Taiwan’s current government maintains that the Republic of China (Taiwan’s official title) is itself a sovereign, independent entity. As the two governments cling fiercely to their positions, bilateral diplomacy has ceased, and the risk of catastrophic war has risen.

This article argues that international law nonetheless offers the conceptual tools needed to build peace in the Taiwan Strait by …

Deep Seabed Mining And The Law Of The Sea: Strategic Competition, Institutional Failure, And The Third Age, Michael W. Lodge

International Law Studies

Edited and annotated speech by Michael Lodge, former Secretary-General of the International Seabed Authority (2017–2024), delivered at the U.S. Naval War College, Newport, Rhode Island, on March 11, 2026.

International Law Situations: Internment Of Belligerent Forces, Raul (Pete) Pedrozo

International Law Studies

This Situation examines the duty of neutral States to detain belligerent warships, their officers, and crews during an international armed conflict. At the outset of the armed conflict between the United States and Iran, Iranian warships sought refuge in India and Sri Lanka following the sinking of the Iranian frigate IRIS Dena. India and Sri Lanka, as neutrals, have a duty to detain those warships and their officers and crews for the duration of the armed conflict and take appropriate measures to render the ships and their personnel incapable of taking to sea during the conflict.

International Law Situations: Humanitarian Corridors, Raul (Pete) Pedrozo

International Law Studies

This Situation examines the use of humanitarian corridors during an international armed conflict. While humanitarian corridors are not defined in international law, they have been used both on land and at sea to evacuate non-combatants, allow for the provision of humanitarian relief supplies, and provide for the safe passage of neutral shipping in areas of ongoing conflict.

What’S In A Name? Much Ado About “War-Sustaining” Objects, W. Casey Biggerstaff

International Law Studies

Recent conflicts have renewed the long-running debate over the legality of attacking economic objects under the law of armed conflict. Within that discourse, observers frequently frame the controversy in relation to an abstract U.S. “war-sustaining” position. Critics often characterize the United States as advancing a distinctive and overly permissive interpretation of military objectives that allegedly departs from the targeting criteria set forth in Article 52(2) of Additional Protocol I. This article challenges that characterization. It concludes that the United States does not apply a separate “war-sustaining” lex specialis to economic objects. Rather, U.S. practice reflects a contextual application of Article …

International Law Situations: Economic Warfare At Sea, Raul (Pete) Pedrozo

International Law Studies

This Situation examines what measures belligerents may take against enemy and neutral merchant ships at sea during an international armed conflict. Operation Epic Fury serves as the backdrop to demonstrate the applicability of economic warfare during international armed conflict at sea. Iranian-flagged and Guyanese-flagged vessels are operating in service of the Iranian economy and war effort. These ships may be captured as part of U.S. economic warfare against Iran.

International Law Situations: Blockade, Raul (Pete) Pedrozo

International Law Studies

This Situation examines the right of belligerents to establish and enforce a blockade and the right to conduct visit and search of enemy and neutral merchant ships globally outside neutral waters.

International Law Situations: Belligerent Straits, Raul (Pete) Pedrozo

International Law Studies

This Situation examines the measures that belligerents may take to regulate navigation by neutral and belligerent shipping through international straits. Iran has imposed several illegal measures on neutral shipping in the Strait of Hormuz to manage transits through the strait, to include the imposition of tolls, establishment of a prior permission regime, and closure of the strait. This Situation analyzes Iran's actions under international law.

Battlefield Uncertainties And The Use Of Ai, Tsvetelina Van Benthem

International Law Studies

This article explores the relationship between uncertainty in armed conflict, the use of artificial intelligence (AI), and the content of international law. It first provides a review of different types of conflict-related uncertainty, both internal to the party to conflict and external, and considers the interaction between these existing uncertainties and the use of AI. In so doing, it also explores the new uncertainties that can be introduced through AI. Second, it analyzes national submissions on military uses of AI and autonomous weapons to outline the uncertainties raised by States and their relevance for regulatory approaches to the use of …

Technology-Based Challenges To The Law Applicable To Trade Interdiction During Armed Conflict At Sea: The Law Of Naval Warfare And Convoy Operations, Rob Mclaughlin

International Law Studies

The practice of convoy involves the concentration of a group of merchant vessels under the control and direction of warships and military aircraft for the purpose of protecting it from belligerent capture or attack. The practice has often been described as obsolete, but asserting the demise of the convoy has been as regular as it has been premature. It is fitting that this operational practice be subject to an updated legal treatment and identification of new legal challenges. This article seeks to reassess the law applicable to convoys based on the consequences of certain post-1945 technological developments. It notes that …

Closing The “Extreme Circumstances” Gap: The Legality Of Nuclear Weapons When The Survival Of A State Is In Question, Christopher J. Hart

International Law Studies

There is a gap at the heart of the law governing the use of nuclear weapons. Repeated threats by Russian leaders to use nuclear weapons against Ukraine highlight the urgency of closing this gap. This article reviews the central holding of the 1996 International Court of Justice advisory opinion on the Legality of the Threat or Use of Nuclear Weapons. The article focuses on the controversial “extreme circumstances” clause, in which the ICJ stated that it could not determine the legality of using nuclear weapons when the survival of a State was in question. This left open the questions …

In Memoriam: Professor Richard J. “Jack” Grunawalt, The Editors

International Law Studies

We remember Professor Jack Grunawalt, Feb. 2, 1934 – Sept. 22, 2025

“I Plead Ignorance”: Autonomous Weapons And Criminal Liability For Not Knowing The Knowable, Jonathan Kwik

International Law Studies

This article argues that the unpredictability and unintuitive behavior of modern artificial intelligence provide more opportunities for users of autonomous weapon systems (AWS) to remain ignorant of risks posed by their systems to protected entities on the battlefield, and that this ignorance can be maintained even in iterative situations featuring a prior civilian casualty event. It demonstrates this theorem through illustrative targeting scenarios, before formalizing the argument through a model showing the evolution of an AWS-user’s mens rea as they receive notice of a prior incident, and choose to pursue—or not pursue—an inquiry. This analysis reveals a perverse incentive structure, …

Modes Of Liability For Ai-Enabled Crimes In International Criminal Law, Antonio Coco

International Law Studies

As artificial intelligence (AI) technologies become increasingly embedded in human activity, the question of individual accountability for AI-enabled international crimes grows more pressing. This article examines how established doctrines of individual criminal responsibility under international criminal law—particularly the modes of liability recognized in the Statute of the International Criminal Court and in the jurisprudence of international criminal tribunals—may be applied to human actors who interact with AI systems in the commission of core international crimes. Through four hypothetical scenarios, the article explores varying forms of human involvement—from programming to deployment—and assesses whether existing modes of liability, such as perpetration, instigation, …

Ai-Enabled Decision-Support Systems In The Joint Targeting Cycle: Legal Challenges, Risks, And The Human(E) Dimension, Jessica Dorsey, Marta Bo

International Law Studies

Israel’s military campaign in Gaza as well as ongoing conflicts in Ukraine, Yemen, Iraq, and Syria include the reported military use of AI-enabled decision-support systems (AI-DSS) within the joint targeting cycle (JTC). These tools use AI techniques to collect and analyze data, provide information about the operational environment, and make actionable recommendations with the aim of aiding military decision-makers in evaluating factors relevant to legal compliance, such as taking precautions and ensuring proportionality in attacks. These systems are often touted as being simply a human aid and, as such, have flown largely under the radar regarding regulation as they are …

Legal Issues Arising From The Military Use Of Ai-Supported Biometrics, Marten Zwanenburg

International Law Studies

Biometrics is increasingly used by armed forces for a variety of purposes, such as access control, the registration of detainees, and increasingly also targeting. The capabilities of biometric systems are considerably strengthened when they are enabled by artificial intelligence (AI). This article analyzes legal questions that are raised by the military use of such AI-supported biometrics. It argues that relevant legal frameworks are International Humanitarian Law, international human rights law, and the right to privacy in particular, as well as data protection law. The article finds that arguably, IHL may require the use of (AI-supported) biometrics in certain situations if …

Ai And Naval Operations, Wolff Heintschel Von Heinegg

International Law Studies

Artificial intelligence systems in naval operations are reality. They enhance naval capabilities in various respects. Autonomous surface and underwater vehicles depend on such systems. Moreover, these systems contribute to threat detection and identification, to real-time strategy optimization, and to intelligence analysis. The present article provides a brief analysis of the legality of AI systems used by naval forces under the law of naval warfare, which, in many respects, differs considerably from the law of land warfare. Accordingly, it is necessary to distinguish between attacks from the sea against targets on land and attacks against targets at sea and in the …

Military Ai And The Specter Of The Limitless War, Yuval Shany, Yahli Shereshevsky

International Law Studies

Legal and extra-legal factors related to the development of international humanitarian law (IHL) support the exercise of strategic restraint during armed conflicts. We claim, however, that technological developments in the area of military artificial intelligence (AI) fundamentally do away with many of the technological constraints that limited the capacity of militaries to fully utilize the “license to kill” afforded to them by IHL. Such a violence-enhancing effect can become even more dramatic in cases where other restraining factors are less effective. The upshot of our analysis is that the implicit assumption that IHL would be applied in a context of …

Artificial Intelligence And The “Armed Attack” Threshold In International Law, Katie A. Johnston

International Law Studies

This article argues that the deployment of artificial intelligence, even in its strong fully autonomous form, does not have significant consequences for the application of the jus ad bellum framework, and in particular the armed attack threshold. As with all new weapons technologies, the deployment of artificial intelligence in the resort to force requires consideration of what “imminence” means in this context. However, artificial intelligence is fundamentally a means of making decisions to resort to force or contributing to the reasons for which such decisions are made by humans. Unlike the jus in bello, the jus ad bellum is …

Assessing The Role Of Ai In Determining The Necessity And Proportionality Of The Exercise Of Self-Defense Against An Armed Attack, Marco Roscini

International Law Studies

This article explores whether artificial intelligence (AI) constitutes an asset or rather a challenge in assessing the necessity and proportionality of a State’s response to an armed attack in the context of self-defense. Two central arguments are advanced. First, while AI may assist in detecting incoming threats of armed attacks, abstract and highly context-driven notions like necessity and proportionality would be very difficult to encode into algorithms. Second, even assuming that this were possible, relying on AI to determine the necessity and proportionality of a self-defense response would present as many challenges as it does advantages and, therefore, should be …

Symposium—Introduction, Russell Buchan

International Law Studies

In March 2025 the University of Reading and the U.S. Naval War College convened a workshop at the University of Reading in the United Kingdom to examine the application of the jus ad bellum, jus in bello, and international criminal law to the use of military AI. This is the introduction to the symposium, published as Volume 107 of International Law Studies.

Classification Of The Armed Conflicts In The Near East, Marco Sassòli

International Law Studies

This article explores the proper classification of Israel’s current conflicts with Hamas and Hezbollah as international or non-international armed conflicts. It discusses the different possibilities of how the international humanitarian law of international or non-international armed conflict applies to those conflicts and whether and to what extent the international humanitarian law of military occupation applies to the conduct of Israel Defence Forces in the Gaza Strip and Lebanon. It also explains why the proper classification of the conflicts still matters and is not only an intellectual exercise for scholars or students. While every conflict has its specifics, the article deals …

Iran And Its Proxies: Attribution And State Responsibility, Jennifer Maddocks

International Law Studies

Iran has invested heavily in proxy militias since the regime's founding in 1979. In the decades that followed, groups such as Hezbollah in Lebanon, Shi'a militias in Iraq and Syria, and the Houthis in Yemen have projected Iran's influence across the region. Today, Iran's proxy network is considerably weakened due to Israel's military actions following October 7, 2023, and the fall of the Assad regime in Syria. Yet the Houthis' attacks on Israel and against Red Sea shipping demonstrate how Iran's support to these groups continues to facilitate their conduct in violation of international law. This article examines Iran's potential …

Space: The Final Frontier (For State Power): The History Of The East India Company And The Future Of Outer Space, Richard Culbert

International Law Studies

Outer space may be the last domain where States largely lack the capability to use coercive force as an instrument of State control. In all areas of the globe, major powers have militaries and police forces that far exceed the capability of even the largest corporations. As corporations take an increasingly large role in outer space commerce it is likely that these private actors will develop a capacity to use force that quickly surpasses even the most powerful States.

To date there has been little analysis of this future phenomenon by legal scholars. Perhaps as a result, the current international …

Commander, U.S. Indo-Pacific Command, Remarks At The 2025 Military Law And Operations Conference, Samuel J. Paparo

International Law Studies

Admiral Samuel J. Paparo, Commander, U.S. Indo-Pacific Command, Remarks at the Military Law and Operations Conference, September 8, 2025

Ai Enabled Autonomous Weapons And Human Control: Part Iii: Human Control And System Operators, Lena Trabucco

International Law Studies

This article is the third installment of a three-part series on AI-enabled weapons and human control. Artificial intelligence (AI) is shaping debates about military technology by challenging the role of human decision-making in the use of autonomous weapon systems (AWS). This article argues that effective governance of AI-enabled AWS requires moving beyond narrow conceptions of “meaningful human control” and instead recognizing a network of embedded human judgment throughout the weapon system’s lifecycle. This article focuses on the operator stage, examining the unique role of operators through guiding, observing, and terminating deployed AWS. Drawing on policy debates, doctrinal frameworks, and empirical …

Ai-Enabled Autonomous Weapons And Human Control: Part Ii: Human Control And Military Commanders, Lena Trabucco

International Law Studies

This article is the second installment of a three-part series exploring human control throughout the entire life cycle of an autonomous weapon system (AWS). The series aims to understand the decision-making process and identify key decision-makers to see how human judgment is embedded into an AWS's parameters. Each article in this series focuses on a different stage of the life cycle. The first article discussed the roles and responsibilities of software developers and designers during the design and development phase. This article looks at the role of commanders in decision-making related to AWS deployment. The third article in the series …