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Use of Force

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World flags in front of the United Nations building

The Definition of Aggression and Self-Defense

Exactly forty-six years ago, on December 14, 1974, the United Nations General Assembly adopted, by consensus, the Definition of Aggression, “the most serious and dangerous form…
Women wait with children in a ward at a malnourishment treatment centre in Yemen's northern Hajjah province on November 22, 2020. The beds the children lie in are covered in netting, and the walkways between beds are very small since the beds are crowded together.

Biden Must Stick to His Pledge to End US Support for the Yemen War

The war in Yemen is a global mark of shame, and the resulting humanitarian disaster threatens the lives of 24 million people.
Patmanathan Kokilavani holds photos of her two children at a protest site for loved ones of the disappeared on May 13, 2019 in Mullaitivu, Sri Lanka. Behind her are numerous photos strung on a wall of others who are disappeared.

Human Shields and Proportionality: How Legal Experts Defended War Crimes in Sri Lanka

The Sri Lankan Civil War constitutes an unprecedented case in terms of the number of people who were framed as human shields and the mobilization of prominent human rights…
A picture taken on October 16, 2020 shows a destroyed tank in the city of Jabrayil, where Azeri forces regained control during the fighting over the breakaway region of Nagorno-Karabakh.

The Nagorno-Karabakh Conflict and the Exercise of “Self-Defense” to Recover Occupied Land

The fighting raised a fundamental but surprisingly overlooked question of international law on the use of force.
Map of Finland with an abstract pattern representing networks.

Finland Sets Out Key Positions on International Cyber Law

Analysis of the Government of Finland's new statement on international law in cyberspace.
A U.S. Air Force MQ-1B Predator unmanned aerial vehicle (UAV), awaits a mission at an air base in the Persian Gulf region on January 7, 2016.

What a Few Cakes Say About the US Drone Program

Fondant creations on cakes - yes cakes - provide a rare window into a largely closed culture of national security policymaking. Their creation in 2013, publication, and re-emergence…

Toward a New Approach to National and Human Security: End Unlawful, Secret, and Unaccountable Use of Lethal Force

A core component of post-9/11 counterterrorism policy has been the use of secretive and unaccountable killings of terrorism suspects. The killings must stop. Here's how the president…
Venezuelan Minister of Foreign Affairs, Jorge Alberto Arreaza holds the Charter of the United Nations during a press conference at the Ministry of Foreign Affairs, in Caracas, on January 28, 2019.

The UN Charter’s Original Effect on State Sovereignty and the Use of Force

In 1945, not all states were UN members and not all territories were states: Dehn explains how use of force and self-defense rights under the Charter reflect these different statuses…
A spaceship in space.

A Threat or A Warning: Russia’s Weapons Testing in Space

Are there rules governing the use of weapons in space? A well-established framework of international law centered on the Outer Space Treaty (OST), to which all major spacefaring…
USTR Robert Lighthizer swears in Deputy USTR C.J. Mahoney, who is accompanied by his wife Becca.

Questions the Senate Should Ask State Legal Adviser Nominee CJ Mahoney

The State Department Legal Adviser is the most senior U.S. lawyer responsible for ensuring the United States upholds its international legal obligations, which is now, more than…
US Defense Secretary Mark Esper (L) and Chairman of the Joint Chiefs of Staff General Mark A. Milley, testify about the Defense department budget during a Senate Armed Services Committee hearing on Capitol Hill in Washington, DC, March 4, 2020.

DOD’s New Ex Gratia Policy: What’s Right, What’s Wrong, and What’s Next

On June 22, the Department of Defense (DOD) issued an interim policy regulation for providing ex gratia payments to civilians harmed as a result of U.S. military operations. It…
Smoke billowing out of buidlings following a coalition air strike in the western al-Daraiya neighbourhood of the embattled northern Syrian city of Raqa on September 5, 2017.

Toward a Consistent and Coherent Ex Gratia Policy for Civilian Casualties

The summer of 2017 was an extended nightmare for the Badrans. Over the course of several weeks, 39 members of Rasha Badran’s family, most of them women and children, were killed…
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