Jus ad Bellum
186 Articles
Fragmented Wars: International Law and Multi-Territorial Conflict Against Non-State Armed Groups
The legal issues surrounding military operations against non-State armed groups abroad are continuing to generate policy and legal debates. In an article just published in International…
On the Precipice: The U.S. and Russia in Syria
A Russian air force Su-30 fighter jet in Syria. The United States and Russia have entered a new and dangerous moment. On Sunday, a U.S. fighter jet shot down a Syrian warplane.…
About that “Deconfliction Zone” in Syria: Is the United States on Firm Domestic and International Legal Footing?
The U.S. military has at least three times in recent weeks engaged in hostilities against pro-Syrian regime forces near the At Tanf garrison in southern Syria and shot down a pro-regime…
Israeli Airstrikes in Syria: The International Law Analysis You Won’t Find
The United States engages in a one-off attack on a Syrian airbase and within a matter of days predictions of an end to international legal order as we know it are flying left and…
What’s at Stake for US Officials if Their Use of Force is an Int’l Crime of Aggression?
In an article at Just Security last week, Michael Adams expressed surprise at the lack of attention on these and other pages to the possibility that the U.S. Tomahawk strikes on…
Yemen’s consent for U.S. counterterrorism operations: Questions for the Trump Administration
On Thursday, the New York Times reported that Yemen had withdrawn its consent from US Special Operations ground missions in the country, following a commando raid Jan. 29, which…
The United Kingdom’s “Modern Law of Self-Defence”—Part III
On Wednesday, Jeremy Wright QC MP, the Attorney General of the United Kingdom, delivered an important speech laying out his government’s view of the international law governing…
The United Kingdom’s “Modern Law of Self-Defence”—Part II
In a previous post, I argued that a recent speech by Jeremy Wright QC MP, the Attorney General of the United Kingdom, left quite unclear whether the lawfulness of anticipatory…
The United Kingdom’s “Modern Law of Self-Defence”—Part I
On Wednesday, Jeremy Wright QC MP, the Attorney General of the United Kingdom, gave a speech intended to clarify his government’s understanding of the international law framework…
A Must Read Speech: UK Attorney General on Use of Force, Imminence, and International Law
In an important speech today (available here), the UK Attorney General, Jeremy Wright, MP, lays out the UK’s views on the use of force against non-state actors, the grounds…
Category Mistake: There Is No Jus ad Bellum for Use of Force Against Non-State Actors
From South Asia to Europe and beyond, government lawyers have to inquire as to when a State is legally justified in resorting to military force against a non-State actor. What…
Human Rights Law is the Legal Basis for Use of Force Against Non-State Armed Groups—But What Follows?
In recent weeks there have been two significant and related debates on Just Security about the justification for the use of force against non-state armed groups and the place of…