UN Charter

Highlights:

Von der Leyen, in a white shirt and a light-red suit jacket, shakes hands with Frostadottir at the left of the image in a dark brown suit, both smiling towards the camera against a royal blue backdrop flanked by their respective flags -- blue with a red and white cross for Iceland and blue with a circle of gold stars for the EU.

Is Trump pushing Iceland into the EU?

Iceland may seek European integration partly as a hedge against a more capricious and unpredictable United States, and others may follow.
Collage of the Israel-Iran conflict

Collection: Iran, Israel and the United States at War (2025-2026 Operations)

Experts analyze the US-Israel Iran military conflicts - covering nuclear diplomacy; strategic, security, and regional implications; and domestic and international law.

Why the Dearth of Female Nominees for U.N. Secretary-General?

UN member states should expand the field of candidates for Secretary-General by nominating more women for the role.
General view taken at the start of the first hearing at the International Court of Justice in which Myanmar is accused of committing genocide against the country's Muslim minority, the Rohingya, in the Hague on January 12, 2026.

Genocide and Intent to Kill Revisited

An expert examines the implications of the ICJ's caselaw for the genocide case that Gambia brought against Myanmar.
U.S. Secretary of Defense Pete Hegseth testifies during a Senate Appropriations Committee hearing in the Dirksen Senate Office Building on Capitol Hill on July 21, 2026 in Washington, DC.

Clausewitz on Operation Epic Fury

Applying Clausewitz’s principles to Operation Epic Fury reveals the war’s strategic design–architecture linking military action to political purpose–was deficient from…

Collection: U.S. Lethal Strikes on Suspected Drug Traffickers, Operation Southern Spear, Operation Absolute Resolve

Collection of expert analysis on the legality of the U.S. strike on Venezuelan vessels in the Caribbean, the consequences of the strike, and related issues.
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190 Articles
This photograph shows smoke rising above buildings following an air attack in Kharkiv on June 10, 2026, amid the Russian invasion of Ukraine.

Beyond the Vanishing Point? What the Destruction of Civilian Infrastructure in Armed Conflicts Reveals about the State and the Role of IHL Today

There is a widening gap between international humanitarian law and the realities of civilians affected by armed conflicts.
This photo taken on July 16, 2025 shows the logo of the International Seabed Authority (ISA) in Kingston, Jamaica.

Deep Sea Mining and the Logic of Contracting Around the Commons

A non-binding U.S.-Japan agreement on deep-sea mining highlights the weaknesses and vulnerability of the International Seabed Authority.

Key Questions on U.S. Killing Tren de Aragua Leader Inside Venezuela

Does the killing of Tren de Aragua's leader by the U.S. military in Venezuela constitute murder? An extrajudicial killing? What was its purported legal basis?
U.S. forces patrol the Arabian Sea near M/V Touska on April 20, 2026, after firing upon the Iranian-flagged vessel that the U.S. accused of attempting to violate the U.S. naval blockade of Iranian ports near the Strait of Hormuz.

Blockade and Article 2(4) of the UN Charter

"The U.S. military’s enforcement of the ongoing naval blockade of Iran may have now resulted in fresh violations of the U.N. Charter against four entirely different countries."
Pigeons fly against a darkened, cloudy sky looming over a skyline of mid-rise buildings in the background and a destroyed concrete building in the foreground.

Ukraine and the Special Tribunal for the Crime of Aggression: Redefining International Justice

The tribunal to prosecute Russia's crime of aggression seeks to close one of the most enduring gaps in international criminal law and strengthen the U.N. Charter.
A wide view of the Security Council meeting on the situation in the Middle East, including the Palestinian question on May 21, 2026. (Via UN Photo) A wide view of the Security Council meeting on the situation in the Middle East, including the Palestinian question on May 21, 2026. (Via UN Photo)

Follow the Law, Not the Plan: Legal Considerations for Third States in Gaza

Third State’s support for Trump’s Gaza plan must remain strictly conditioned on compliance with international law and be continuously reassessed in light of evolving facts.…
(L-R) A general view of the capital Nuuk, Greenland, on March 4, 2025. US President Donald Trump has strained relations with Denmark by repeatedly signalling that he wants control over Greenland, an autonomous Danish territory. (Photo by ODD ANDERSEN/AFP via Getty Images); U.S. Secretary of State Marco Rubio listens as U.S. President Donald Trump addresses the media during a news conference at his Mar-a-Lago club on January 3, 2026, in Palm Beach, Florida. During the remarks, Trump confirmed that the U.S. military had carried out a large-scale strike in Caracas overnight, resulting in the capture of Venezuelan leader Nicolas Maduro and his wife, Cilia Flores.(Photo by Joe Raedle/Getty Images); A general view of the capital Nuuk, Greenland, on March 4, 2025. US President Donald Trump has strained relations with Denmark by repeatedly signalling that he wants control over Greenland, an autonomous Danish territory. (Photo by ODD ANDERSEN/AFP via Getty Images)

Collection: U.S., Greenland, and NATO

Experts examine legal, political, and security dimensions of U.S. policy on Greenland, including U.S.-NATO relations, congressional oversight, and geopolitical implications.  
U.S. Secretary of Defense Pete Hegseth listens as Chairman of the Joint Chiefs of Staff Gen. Dan Caine testifies before the Senate Armed Services Committee in the Dirksen Senate Office Building on June 18, 2025 in Washington, DC.

At the 60-Day Mark, the Iran War is Triply Illegal

Under the War Powers Resolution, Trump must now terminate the hostilities against Iran he began two months ago. He seems set against doing so.
A detailed view of the uniform of a senior military member as U.S. President Donald Trump speaks at Marine Corps Base Quantico on September 30, 2025 in Quantico, Virginia.

Legal Foundations of Honorable Military Service

As former judge advocates, it was our responsibility while on active duty to advise on the legal demands of and limits on senior officers’ authority and responsibility.
US Department of State building with sign in front

On the State Department Memorandum “Operation Epic Fury and International Law”

Former State Department attorney's critique of the Department's Iran war memorandum on “Operation Epic Fury and International Law.”

A Primer on Just War Theory and the Iran War

Leading scholar explains just war theory and the Iran war. An assessment of the Trump administration's response to the Catholic Church.
An overhead view of the Pentagon building in Washington, DC.

In Response to the Letter by International Law Experts

Four experts, who have each served as Senior Law of War Advisor, respond to Letter by 100+ international law experts on Iran war published at Just Security.
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