International Humanitarian Law Commons^™

Islamist Terrorism And The Classical Islamic Law Of War, Joseph Hoelz

International Law Studies

Islamist terrorists have had a large influence on U.S. foreign and domestic policy for more than twenty years, and yet policy makers, legal practitioners, and the public know very little about what motivates these violent extremist organizations. A primary unifying principle among the various Islamist terrorist groups is their desire to return to a religiously ordered State, justified and based upon their interpretation of the Shari’a, or Islamic law. This article explores the Islamist terrorist interpretation of Shari’a law and how it generally contradicts that of mainstream Islamic scholars. The article begins with a review of the primary and secondary …

Animating The U.S. War Crimes Act, Beth Van Schaack

International Law Studies

All war crimes are challenging to prosecute. Typical reasons include the technicality of some constitutive elements, the difficulties of amassing sufficient evidence, the vagaries of unreliable or unavailable witnesses, and the often-impenetrable khaki wall of silence. Adding to these challenges, the United States has erected a number of idiosyncratic structural barriers in the way in which it has incorporated the prohibitions against war crimes into its domestic legal frameworks, both military and civilian. This article addresses problems with the U.S. federal war crimes statute and proposes reforms that would (1) better conform to U.S. obligations under the Geneva Conventions and …

Revisiting Ad Bellum Proportionality: Challenging The Factors Used To Assess It, Yishai Beer

International Law Studies

Traditionally, international law has established a binary distinction between jus ad bellum and jus in bello. The former relates to the right to exercise military force. The latter regulates the conduct of adversaries engaged in an armed conflict. However, the prevailing legal approach doesn't accept this dichotomy. It wants to reduce war's hazards by applying the ad bellum rules, including the proportionality requirement, continuously throughout the conduct of armed conflict. To that end, it has established factors that define the essence of the continuing ad bellum proportionality requirement. This article challenges the near-unanimous consensus regarding these factors. It argues that …

Know Thy Enemy: The Use Of Biometrics In Military Operations And International Humanitarian Law, Marten Zwanenburg

International Law Studies

Biometrics is a technology that is increasingly being adopted by armed forces. It is the automated recognition of individuals based on their biological or behavioral characteristics. Important questions in relation to the use of this technology by armed forces concern the legal framework that governs such use. This article discusses the relationship between International Humanitarian Law (IHL) and biometrics, by focusing on a number of different activities carried out during armed conflict in which biometrics can play a role. It concludes that although IHL contains no rules that expressly regulate the use of biometrics, a number of IHL rules are …

Intelligence Sharing In Multinational Military Operations And Complicity Under International Law, Marko Milanovic

International Law Studies

This article examines the international legal framework applicable to intelligence sharing in multinational military operations, with a particular focus on complicity scenarios. It first provides a theoretical overview of the role of fault in complicity, of how intent and knowledge can be conceptualized, and of the attribution of fault to States. It then looks in detail at the rule codified in Article 16 of the International Law Commission’s Articles on State Responsibility, and argues that this rule is best understood as employing multiple modes of fault (direct and indirect intent and wilful blindness). The article also argues that international humanitarian …

Booty, Bounty, Blockade, And Prize: Time To Reevaluate The Law, Andrew Clapham

International Law Studies

This article considers the so-called belligerent rights of States in times of war. In particular it focuses on booty of war, blockade, and the capture of merchant ships and their cargo. It is suggested that, while the rules may not often be applied today, they nevertheless continue to exert a certain influence, contributing to confusion about the boundaries of the legitimate use of force and a blurring of the distinction between military objectives and civilian objects.

Considering that the UN Charter has outlawed the use of force, the article also questions why such rules concerning capture should continue to have …

The Plea Of Necessity: An Oft Overlooked Response Option To Hostile Cyber Operations, Louise Arimatsu, Michael N. Schmitt

International Law Studies

States are increasingly focused on the measures—cyber or otherwise—that they can take in response to hostile cyber operations. Although cyber operations are usually responded to with acts of “retorsion” (acts that are lawful, although unfriendly), international law recognizes other self-help mechanisms that allow for more robust responses. In the cyber context, most attention has focused on countermeasures and self-defense. Yet, both are subject to various limitations that constrain their availability.

This article examines a further option, the so-called “plea of necessity.” It allows States to respond to a hostile cyber operation when the action taken would otherwise be unlawful but …

China’S Container Missile Deployments Could Violate The Law Of Naval Warfare, Raul (Pete) Pedrozo

International Law Studies

China is reportedly developing long-range cruise missiles that can be fired from standard shipping containers loaded on merchant vessels. China is also converting heavy-lift civilian ships and roll-on roll-off (RORO) ferries to serve as de facto amphibious assault ships to support People’s Liberation Army (PLA) amphibious operations. While none of these activities are illegal per se, they do raise potential concerns under the law of naval warfare. Only warships can engage in offensive belligerent rights during an international armed conflict. Using merchant vessels to engage in belligerent rights would violate international law unless China first converts the vessels into warships …

Application Of The Due Diligence Principle To Cyber Operations, Tomohiro Mikanagi

International Law Studies

The discreet use of proxies by States renders it difficult to prove attribution to States under the existing rules of attribution. On the other hand, the due diligence principle, if applicable, does not require attribution but can lead to the invocation of State responsibility for cyber operations emanating from the territory of other States. In the Corfu Channel judgment the ICJ recognized “every State’s obligation not to allow knowingly its territory to be used for acts contrary to the rights of other States,” and UN Member States agreed that existing international law applies to cyber operations. However, the UN Members …

U.S. Recognition Of A Commander’S Duty To Punish War Crimes, Brian Finucane

International Law Studies

This article explores the United States' recognition of the doctrine of command responsibility. The doctrine has been invoked by those alleging that President Trump’s pardons of U.S. personnel convicted or accused of war crimes could amount to war crimes themselves. The article focuses on a commander’s duty to punish war crimes by his subordinates. It examines the United States’ past recognition of the duty to punish as an element of command responsibility under the law of war. The principle that a commander has an obligation to punish war crimes by his subordinates is not a progressive development of the law …

The International Law Of Prolonged Sieges And Blockades: Gaza As A Case Study, Eyal Benvenisti

International Law Studies

In 2007, after Hamas’ takeover of the Gaza Strip, the area was subjected to an Israeli land siege, complemented in 2009 by a sea blockade. Since then, the already-dire living conditions in the Strip have declined consistently and the area’s dependence on external aid has grown. This essay examines the duties of a military power in imposing what is effectively a years-long confinement of people and outlines a general argument for expanding the obligations of a party that imposes a prolonged siege or blockade. I consider these obligations in light of three potentially relevant legal frameworks: the law of occupation; …

Legal Advisers In The Field During Armed Conflict, Yoram Dinstein

International Law Studies

Additional Protocol I to the Geneva Conventions of 1949 requires that legal advisers be made available to military commanders, particularly during hostilities. This treaty stipulation was quite innovative in 1977, but it has achieved widespread implementation, even among non-Contracting Parties. It is noteworthy that the United States—which objects to numerous provisions of Additional Protocol I—does not dissent from the article requiring legal advisers. A study of the practice of States, made by the International Committee of the Red Cross, confirms that the norm requiring that legal advisers be made available to advise military commanders in time of armed conflict currently …

Professor Howard S. Levie: In Memoriam, Yoram Dinstein

International Law Studies

Professor Howard S. Levie: In Memoriam

Neutrality And Cyberspace: Bridging The Gap Between Theory And Reality, Noam Neuman

International Law Studies

While there exists a broad consensus among States that international law generally applies to the cyber domain, particular views regarding the applicability of the law of neutrality have rarely been put forward, and presently there seems to be insufficient State practice and domain-specific opinio juris in this regard. Against this backdrop, several attempts have been made throughout the years to apply certain neutrality rules to cyberspace by referring to analogies from other domains. However, this legal regime provides an emblematic example of what the introduction of traditional rules of international law, formulated with the physical domains of warfare in mind, …

Military Action To Recover Occupied Land: Lawful Self-Defense Or Prohibited Use Of Force? The 2020 Nagorno-Karabakh Conflict Revisited, Tom Ruys, Felipe Rodriguez Silvestre

International Law Studies

In September 2020, heavy fighting erupted between Armenia and Azerbaijan in and around Nagorno-Karabakh, a region of Azerbaijan long controlled by Armenia. After two months of military confrontations, a tripartite ceasefire was concluded, drastically altering the pre-existing territorial status quo.

The "Second Nagorno-Karabakh War" brings to light a fundamental question for international law on the use of force—and one that has received limited attention in legal doctrine. The question is this: when part of a State’s territory is occupied by another State for an extended period of time, can the former still invoke the right of self-defense to justify …

The “External Element” Of The Obligation To Ensure Respect For The Geneva Conventions: A Matter Of Treaty Interpretation, Marten Zwanenburg

International Law Studies

In Common Article 1 of the 1949 Geneva Conventions, States Parties undertake to “respect and ensure respect” for the Conventions. This article focuses on the question whether an interpretation of that provision leads to the conclusion that it contains an external element. The term “External element” refers to an obligation for States to ensure respect for the Conventions not only internally (i.e., by their nationals as a whole), but also by other States, and possibly even by organized armed groups involved in extraterritorial non-international armed conflicts. The article applies the rules of treaty interpretation, as codified in Articles 31 – …

Developing International Guidelines For Protecting Schools And Universities From Military Use During Armed Conflict, Steven Haines

International Law Studies

One consequence of armed conflict, especially that of a non-international character, is serious damage done to vital societal infrastructure. Education–schools and universities–can be severely disrupted, even subject to attack. Targeting of schools may not invariably be unlawful if educational facilities are being put to military use. Such use may itself not be unlawful but it can result in schools being transformed from civilian objects into military objectives–and subject, therefore, to lawful targeting. This was a problem highlighted by humanitarian NGOs a decade ago and led to the formation, by both NGOs and United Nations agencies, of the Global Coalition to …

Protection Of Data In Armed Conflict, Robin Geiss, Henning Lahmann

International Law Studies

This article presents a novel way to conceptualize the protection of data in situations of armed conflict. Although the question of the targeting of data through adversarial military cyber operations and its implications for the qualification of such conduct under International Humanitarian Law has been on scholars’ and states’ radar for the last few years, there remain a number of misunderstandings as to how to think about the notion of “data.” Based on a number of fictional scenarios, the article clarifies the pertinent terminology and makes some expedient distinctions between various types of data. It then analyzes how existing international …

Legal Reviews Of War Algorithms, Tobias Vestner, Altea Rossi

International Law Studies

States and scholars recognize legal reviews of weapons, means or methods of warfare as an essential tool to ensure the legality of military applications of artificial intelligence (AI). Yet, are existing practices fit for this task? This article identifies necessary adaptations to current practices. For AI-enabled systems that are used in relation to targeting, legal reviews need to assess the systems’ compliance with additional rules of international law, in particular targeting law under international humanitarian law (IHL). This article discusses the procedural ramifications thereof. The article further finds that AI systems’ predictability problem needs to be addressed by the technical …

Command Accountability For Ai Weapon Systems In The Law Of Armed Conflict, James Kraska

International Law Studies

The use of artificial intelligence (AI) in weapon systems enhances the ability of operational forces to fuse multispectral sensors to understand the warfighting environment, positively identify, track, and select targets, and engage them with the most appropriate effects. The potential for AI to help close the “kill chain” has raised concern that this creates a gap in accountability between the decisions of humans and the acts of machines, with humans no longer accountable for decisions made during armed conflict. This study suggests that there is no gap because the military commander is always directly and individually accountable for the employment …

Israel’S Perspective On Key Legal And Practical Issues Concerning The Application Of International Law To Cyber Operations, Roy Schöndorf

International Law Studies

The speech given by the Israeli Deputy Attorney General (International Law) at the Naval War College’s event on “Disruptive Technologies and International Law” sets out, for the first time, Israel’s position on the application of international law to cyber operations. Consistent with the position taken by the vast majority of States thus far, Israel considers that international law applies to such operations. The speech stresses that questions pertaining to the identification and application of relevant legal rules remain, given the profound differences between the cyber domain and traditional domains of warfare—land, sea, and air. Therefore, in Israel’s view, a cautious …

Encirclement, Deprivation, And Humanity: Revising The San Remo Manual Provisions On Blockade, Tom Dannenbaum

International Law Studies

Among the most pernicious trends in contemporary armed conflict is the return of mass starvation in war, in some cases as its primary source of human suffering. This has prompted a renewed focus on the relevant rules of international humanitarian law (IHL). On some issues, there is relative consensus. On the issue of deprivation by encirclement, however, there is confusion.

Some have questioned whether the prohibition on the starvation of civilians as a method of warfare applies to encirclements at all, particularly in the naval context. Others have interpreted the prohibition vanishingly narrowly. In contrast to the more extreme of …

Armed Conflicts In Outer Space: Which Law Applies?, Frans G. Von Der Dunk

International Law Studies

So far, outer space has merely become involved in terrestrial armed conflicts as part of the supportive infrastructure for military activities. Unfortunately, the risk that this changes is considerably growing, and it can no longer be excluded that (armed) force will become used in outer space, either directed towards Earth or within outer space itself.

This raises serious issues in the legal context, where space law so far has been premised on the hope that armed conflicts in outer space could be avoided whereas the law of armed conflict was not required so far to deal with the use of …

Responding To Hostile Cyber Operations: The “In-Kind” Option, Michael N. Schmitt, Durward E. Johnson

International Law Studies

Facing hostile cyber operations, States are crafting responsive strategies, tactics and rules of engagement. One of the major challenges in doing so is that key aspects of the international law governing cyber responses are vague, unsettled or complex. Not surprisingly, therefore, international law is markedly absent from strategies and operational concepts. Rather, they tend to take on a practical “tit-for-tat” feel as policymakers logically view “in-kind” responses as “fair play.” For them, responding in-kind surely must be lawful notwithstanding any challenges in discerning the precise legal character of the initial hostile cyber operation.

Testing that sense, this article examines the …

Common Article 1 And The Duty To "Ensure Respect", Michael N. Schmitt, Sean Watts

International Law Studies

Common Article 1 to the four 1949 Geneva Conventions requires Parties to those instruments to “respect and to ensure respect for the present Convention in all circumstances.” The provision is a corollary to the general international legal obligation of States to honor their treaty commitments, expressed classically in the maxim pacta sunt servanda.

Yet, academics and private organizations now use Common Article 1 as a vehicle to reimagine States’ enforcement obligations under the Geneva Conventions. Reinterpreting the article beyond its original meaning, they claim the article includes an “external” obligation—a duty on the part of all States to use …

Autonomous Cyber Weapons And Command Responsibility, Russell Buchan, Nicholas Tsagourias

International Law Studies

Autonomous cyber weapons have made their way onto the battlefield, raising the question of whether commanders can be held criminally responsible under command responsibility when war crimes are committed. The doctrine of command responsibility has a long history in international criminal law and comprises three core elements: the existence of a superior-subordinate relationship, the commander’s knowledge of the crime, and the commander’s failure to prevent or repress the subordinate’s criminal actions. This article unpacks the content of these elements and applies them to autonomous cyber weapons by treating them as being analogous to soldiers since they operate within an organized …

The Human Dimension Of Peace And Aggression, Chiara Redaelli

International Law Studies

Since the adoption of the Charter of the United Nations, the current international legal framework has drastically changed. In its traditional understanding, aggression is “the supreme international crime” aimed at protecting sovereignty and the territorial integrity of states. On the other hand, the U.N. Charter endorses an understanding of peace in the negative sense, that is, as mere absence of war. As human rights have gained momentum, they have helped reshape the legal landscape, a phenomenon referred to as the humanization of international law. How do peace and aggression fit within the humanized legal framework? This article will investigate the …

Autonomy And Precautions In The Law Of Armed Conflict, Eric Talbot Jensen

International Law Studies

Already a controversial topic, legal debate and broader discussions concerning the amount of human control required in the employment of autonomous weapons—including autonomous cyber capabilities—continues. These discussions, particularly those taking place among States that are Parties to the 1980 Certain Conventional Weapons Convention, reveal a complete lack of consensus on the requirement of human control and serve to distract from the more important question with respect to autonomy in armed conflict: under what conditions could autonomous weapons “select” and “attack” targets in a manner that complies with the law of armed conflict (LOAC).

This article analyzes the specific LOAC rules …

The Interplay Of International Obligations Connected To The Conduct Of Others: Toward A Framework Of Mutual Compliance Among States Engaged In Partnered Warfare, Berenice Boutin

International Law Studies

This article examines international obligations that arise in relation to the conduct of other States, and analyzes how they apply and interact in the context of partnered warfare. It investigates rules of State responsibility relevant to the context of partnered warfare, as well as primary norms that impose obligations connected to the conduct of others. In essence, they consist of obligations not to actively help to or to blindly let others do what a State would not do itself. It is argued that, taken together, these rules form the contour of an overarching framework of mutual compliance among States cooperating …

Will Cyber Autonomy Undercut Democratic Accountability?, Ashley Deeks

International Law Studies

In recent years, legislative bodies such as the U.S. Congress and the U.K. Parliament have struggled to maintain a role for themselves in government decisions to conduct military operations against foreign adversaries. Some of these challenges arise from constitutional structures, but they are also due to the changing nature of conflict: a shift away from large-scale kinetic operations and toward smaller-scale operations—including cyber operations—that are less visible and that do not require robust legislative support. These modern operations leave legislatures to engage in ex post and sometimes ineffective efforts to hold their executive branches accountable for international uses of force …