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 als...| 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 Ira...| International Law Studies
U.S. Statement on Agenda Item 13, Meeting of States Parties to the UN Convention on the Law of the Sea, June 25, 2025, presented by Nathan Nagy, representative of the U.S. observer delegation to the 35th Meeting of States Parties to the Law of the Sea Convention, explaining the U.S. position and State practice regarding the legal character of the Law of the Sea Convention seabed mining provisions.| International Law Studies
U.S. Intervention on Agenda Item 8, International Seabed Authority Assembly, 30th Session, July 2025, presented by Greg O’Brien, Head of the U.S. Observer Delegation to the International Seabed Authority, explaining the U.S. position and State practice regarding the legal character of the Law of the Sea Convention seabed mining provisions.| International Law Studies
Admiral Samuel J. Paparo, Commander, U.S. Indo-Pacific Command, Remarks at the Military Law and Operations Conference, September 8, 2025| 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 ...| 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 sy...| 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 de...| International Law Studies
At the center of the emergence of artificial intelligence (AI) and autonomous weapon systems (AWS) is the challenge of human control. AI has the potential to reshape the boundaries of military capabilities. In particular, the increasing sophistication of AWS necessitates a deep examination of the balance between machine autonomy and the role and requirements of human decision-makers. In pursuit of this balance, the concept of meaningful human control emerged. It is a concept born of necessity...| International Law Studies
Perhaps no other word in the international humanitarian law lexicon evokes more interest and emotion than proportionality. How States implement the rule of proportionality is perhaps the most hotly debated aspect of international humanitarian law. The indeterminate nature of the rule allows for its meaning to conform to whatever its reader wants it to mean. This is a consequence of the variables related to key provisions of the rule: How do we assess military advantage? What makes an anticipa...| International Law Studies
This article analyzes the legality of U.S. unilateral seabed mining authorized by Executive Order 14285, signed by President Donald Trump on April 24, 2025, permitting mineral extraction on the U.S. continental shelf and international deep seabed. Critics, including China, the European Union, and the International Seabed Authority, contend that this policy violates international law by circumventing Part XI of the United Nations Convention on the Law of the Sea (UNCLOS), which designates seab...| International Law Studies
Much of the debate surrounding the military use of artificial intelligence (AI) tends to focus on lethal autonomous weapons systems. Those are systems that, once activated, can select and engage targets without further human intervention; sometimes pejoratively called “killer robots.” Moreover, debates often focus on their use and risks in land warfare. This land-warfare focus tends to invoke questions about the systems’ ability to distinguish between combatants and civilians on urban b...| International Law Studies
Outer space is becoming increasingly contested and existing approaches to identifying prohibited force in outer space lack a systematic foundation, hindering their application to novel challenges such as temporary interference with critical satellites or threats involving commercial space actors. This article addresses this gap by developing the first comprehensive, multifactorial legal framework for identifying a prohibited use of force in outer space. This framework provides a structured me...| International Law Studies
The Houthis have carried out an unprecedented assault on commercial shipping and foreign warships operating in international waters off the Arabian Peninsula that has changed the face of maritime terrorism. These waters are a strategic corridor that facilitates international trade and the movement of naval forces from Europe and the Americas to the Middle East and Asia via the Suez Canal. As a result of the Houthi attacks, most shipping companies rerouted their vessels around Africa via the C...| U.S. Naval War College Digital Commons
This article examines whether the U.S. nuclear umbrella provided to allies is currently viable and whether it is time for the United States to share nuclear weapons technology with its allies in the Asia-Pacific to counter the growing nuclear threat posed by China, North Korea, and Russia. The article discusses the current capabilities and nuclear doctrine of States possessing nuclear weapons, as well as Iran’s nascent nuclear weapons program. It then discusses the current international law...| International Law Studies
This essay explores China’s approach to global order. China’s remarkable rise has coincided with increasing engagement with the institutions of global governance. These institutions—in particular the United Nations—make up the core of what U.S. leaders have often referred to as the liberal world order or the rules-based order. Many U.S. officials see China as a deep threat intent on challenging, and perhaps even seeking to replace, this rules-based order. This essay, however, makes th...| International Law Studies
In the Nicaragua Case, the International Court of Justice described coercion as the “very essence of prohibited intervention.” The characterization of coercion as an essential element of non-intervention has become unquestioningly accepted by States and scholars and has dominated debates on how the prohibition on intervention applies in various contexts, including in relation to economic sanctions and cyberoperations. This article challenges the ICJ’s assertion. It does so by retracing ...| International Law Studies
The Newport Manual on the Law of Naval Warfare, Second Edition, is a continuing effort to restate the law of naval warfare as a purely lex lata exercise. Like the first edition of 2023, it is designed to provide a practical guide for commanders and seafarers, lawyers and officials, and educators and students. In doing so, the Manual includes developments in warfighting technologies in recent decades, which have significantly influenced the nature of war at sea. This second edition has been ed...| U.S. Naval War College Digital Commons
Combating sabotage of submarine cables and pipelines is a matter of law enforcement, subject to the international law of the sea. However, such acts may also constitute the use of force and an armed attack under Articles 2(4) and 51 of the UN Charter. The application of these concepts requires clarification of the “international relations” in which the use of force takes place and identification of the State against which the armed attack occurs. This article argues that, in the absence o...| International Law Studies
Since 2022, there have been several incidents of apparent intentional damage to submarine cables and pipelines in the Baltic Sea and in the waters around Taiwan. Affected coastal States correctly complain that malign actors, like Russia and China, exploit gaps in international law that make it exceedingly challenging to hold the perpetrators accountable. None of the international agreements applicable to the protection of critical undersea infrastructure provide for adequate coastal State enf...| U.S. Naval War College Digital Commons