General

Under any view, the privilege of combatancy is key to the basic architecture of the law of war. It stands at the fault line between domestic criminal law and International Humanitarian Law, between impermissible killing and lawful belligerency. Simply put, the privilege of combatancy transforms, almost magically, what would otherwise be an unlawful act of murder into a lawful killing...

Since the recent al Bahlul en banc decision before the D.C. Circuit, I have been thinking a lot about the Common Law of War. As others have already analyzed in detail (Steve, Peter, Jonathan, Marty & Steve), the D.C. Circuit upheld Bahlul’s conviction for conspiracy but threw out his conviction for material support for terrorism and solicitation. Material support and solicitation...

Your weekly selection of international law and international relations headlines from around the world: Africa The Liberian government has closed most of the West African nation's border crossings and introduced stringent health measures to curb the spread of the deadly Ebola virus that has killed at least 660 people across the region. Nigerian Boko Haram militants kidnapped the wife of Cameroon's vice prime...

This week on Opinio Juris, our Emerging Voices symposium continued with a post by François Delerue on cyber operations and the prohibition on the threat of force, a comparison by Otto Spijkers of the Nuhanović and Mothers of Srebrenica cases, and Arpita Goswami's analysis of the PCA's recent Bay of Bengal Maritime Arbitration Case between India and Bangladesh. We also welcomed Jens Ohlin...

[Charles Kels is a major in the U.S. Air Force Reserve and an attorney for the Department of Homeland Security. He is writing in his personal capacity and his contribution is not meant to represent the views of the Department of Homeland Security, Air Force or Defense.] Group Captain Henderson and Squadron Leader Cavanagh’s series of posts comparing and contrasting the...

A background paper for a High Level Review of Sanctions currently underway at the UN raises some important and interesting questions about the increasing "jurisdictional overlap" between individuals designated on targeted sanctions lists and international criminal courts.   In relevant part, the paper states: Increasingly, the reach of sanctions has gone beyond those responsible for initiating and supporting threats to, or breaches...

In two decisions (here and here) handed down this morning, the European Court of Human Rights has found that Poland violated its obligations under the European Convention of Human Rights for its complicity in the United States' running of a CIA black site and high-value detainees program on Polish territory. One of the cases involved al-Nashiri, who was prosecuted before a U.S. military...

The recent downing of Malaysian Airlines Flight 17, apparently by an anti-aircraft missile fired from within rebel-controlled territory in the Ukraine, has raised the specter that Russia is covertly (or not so covertly) supplying arms and assistance to the pro-Russian separatists operating within eastern Ukraine. Obviously, the facts here are somewhat contested and I have no insider or independent information...

[Jonathan Hafetz is Associate Professor of Law at Seton Hall Law School.  He has represented several Guantanamo detainees and has filed amicus briefs in previous legal challenges to military commissions.] On July 14, the en banc U.S. Court of Appeals for the D.C. Circuit issued its long-awaited (and deeply fractured) opinion in Al Bahlul v. United States (.pdf), addressing the scope of military commission jurisdiction over offenses—material support for terrorism, solicitation, and conspiracy—that are not crimes under international law.  In a nutshell, the D.C. Circuit vacated Bahlul’s conviction for material support and solicitation, but affirmed his conviction for conspiracy against an ex post facto challenge.  While the ruling takes material support and solicitation off the table for commission prosecutions (at least for prosecutions of current Guantanamo detainees), it does not resolve the viability of charging conspiracy as a stand-alone offense because the en banc holding is based on the application of plain error review to Bahlul’s case (due to its conclusion that Bahlul failed to preserve his ex post facto challenge below).  The decision thus leaves open the fate of conspiracy under de novo review.  By implication, it also leaves open the viability of the U.S. government’s domestic war crimes theory not only with respect to other commission cases charging conspiracy (including the ongoing prosecution of the 9/11 defendants), but also with respect to Bahlul’s other legal challenges to his conspiracy conviction, which the en banc court remanded to the original D.C. Circuit panel. This post will examine the multiple opinions in Bahlul addressing the U.S. government’s domestic war crimes theory, which posits that the Military Commissions Act of 2006 (2006 MCA) retroactively authorizes, and that the Constitution allows, the prosecution by military commission of conduct that is not a crime under the international law of war.  (For excellent summaries of the Bahlul decision, see posts at Just Security by Steve Vladeck here and by Steve and Marty Lederman here).  The theory’s viability is central to the retroactivity arguments addressed by the en banc court as well as to the additional arguments under Article I and Article III that will be considered on remand.

Professor Jens David Ohlin of Cornell Law School will be guest blogging with us over the next two weeks. Many readers may know Jens from his blogging at Lieber Code and from his many articles on international criminal law, the laws of war, cyberwar, and comparative criminal law, among other topics. Jens is also the author or editor of four books,...

Your weekly selection of international law and international relations headlines from around the world: Africa Suspected Islamists raided the remote northeast Nigerian town of Damboa over the weekend, shooting dead more than 40 residents and burning down houses in a familiar pattern of killing that has forced tens of thousands to flee their homes this year. South Sudanese rebels and government soldiers clashed...

This week on Opinio Juris, we kicked off the second edition of our Emerging Voices symposium with a post by Zachary Clopton on the horizontal and vertical dimensions of international law in U.S. Courts, followed by Abel Knottnerus' post on rule 134quater. Julian clarified last week's post on Taiwan and argued that "lawfare" will not deter China in the South China Sea. He...