Use of Force
Large-Scale Combat Operations Symposium – Counterterrorism Thinking and “Large-Scale Combat Operations”
Editor’s note: The following post highlights a subject addressed during an expert workshop that the Lieber Institute co-convened alongside Harvard Law School’s Program on International Law and Armed Conflict and the International Committee of the Red Cross, focusing...
Are States Aiding and Assisting Ukraine and Russia Using Force?
The provision of military aid and assistance from States supporting Ukraine and Russia has been a salient theme in their international armed conflict following Russia’s renewed invasion in February 2022. As of late March 2023, for instance, over fifty States have...
Use of Force and UN Mandates to Protect Civilians
The UN’s protection of civilians (PoC) concept remains contested twenty-three years after the first PoC mandate given to the United Nations Mission in Sierra Leone (UNAMSIL) in 1999. The PoC component of a UN peacekeeping mandate can consist of all sorts of measures...
BUL Event on the Use of Force, Legitimacy, Non-state Actors, and Bilateral Security Agreements
On January 18, at the Brunel University London (BUL) School of Law, the BUL International Law Group, held an event exploring the use of force and international law (the video can be found here). The discussants addressed questions that are sure to be on the minds of...
Türkiye’s Threats against Greece: A Violation of Article 2(4) of the UN Charter?
On September 5-6, 2022, the Greek Foreign Minister Mr. Nikos Dendias sent letters to the EU, NATO, and the UN to bring to their attention public statements made by Türkiye’s President Recep Tayyip Erdogan whose “openly threatening nature and tone are more than...
Cyber Symposium – The Private Sector View on Use of Force
Editor’s note: The following post highlights a subject addressed in the symposium entitled The Evolving Face of Cyber Conflict and International Law: A Futurespective presented by the Lieber Institute for Law and Warfare at the American University, Washington College...
Cyber Symposium – The Evolution of Cyber Jus ad Bellum Thresholds
Editor’s note: The following post highlights a subject addressed in the symposium entitled The Evolving Face of Cyber Conflict and International Law: A Futurespective presented by the Lieber Institute for Law and Warfare at the American University, Washington College...
Cyber Symposium – Diplomatic Considerations for Armed Attack
Editor’s note: The following post highlights a subject addressed in the symposium entitled The Evolving Face of Cyber Conflict and International Law: A Futurespective presented by the Lieber Institute for Law and Warfare at the American University, Washington College...
Cyber Symposium – The Evolving Face of Cyber Conflict and the Jus ad Bellum: A Futurespective
From 15 through 17 June 2022, the Lieber Institute for Law and Warfare met in Washington, D.C. with the Tech, Law & Security Program at the American University, Washington College of Law to present a symposium entitled The Evolving Face of Cyber Conflict and...
Lieber Institute White Paper: Responding to Malicious or Hostile Actions under International Law
Recent consultations with senior legal advisers have highlighted the need for a clear map of response options available to States facing hostile or malicious actions, whether attributable to another State or a non-State actor. After all, to respond effectively to such...
Remarks on the Law Relating to the Use of Force in the Ukraine Conflict
Professor Mike Schmitt has addressed the application of the right of self-defense to the Russian invasion of Ukraine. This post adds comments on the application of the law relating to the use of force to the present conflict. Specifically, I address whether there is...
Keeping the Ukraine-Russia Jus ad Bellum and Jus in Bello Issues Separate
In any situation of international armed conflict (IAC), such as that between Ukraine and Russia right now, two bodies of law necessarily come into sharp relief: The jus ad bellum, which deals with the “why” of the IAC (the legitimacy or otherwise of going to war); and...