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Use of Force

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Damaged bridge over a river with a large hole in the middle and people looking on.

When Civilian Infrastructure Becomes a Lawful Target

Civilian infrastructure is not targetable merely because it is economically significant or politically useful to strike, but only when it offers a definite military advantage.
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…

How Congress Can End Trump’s Iran War and Prevent the Next One

By defying Congress's vote on the Iran war, Trump has again disregarded constitutional limits on war-making, underscoring the need for firmer congressional action.

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.
People wave Syrian flags as they celebrate a year since the ousting of longtime ruler Bashar al-Assad in the Syrian capital Damascus on December 8, 2025. (Photo by LOUAI BESHARA / AFP via Getty Images)

Syria in Transition Series

Experts asses accountability, reconciliation, institutional reform, constitutionalism, and more in transitional Syria.
Ecuadorean soldiers stand atop an armoured vehicle at the La Ferroviaria command post in Duran, Guayas province, Ecuador on March 15, 2026.

A Dangerous Legal Loophole: Consent is Not Enough for U.S. Military Activities in Latin America

States should not be able to consent to others using force that they cannot use themselves, and intervening states should not blindly rely on host state consent.
U.S. President Donald Trump shakes hands with CIA Director John L. Ratcliffe (R) during a news conference in James S. Brady Press Briefing Room of the White House on April 06, 2026 in Washington, DC.

When Warning Loses to Permission: Iran, Trump, and the Misapplied Label of “Intelligence Failure”

The failure point, at each stage, was not the intelligence community's analysis. It was the president’s decision-making.
Guterres speaks at a podium in the massive General Assembly hall, on a large dais at the base of a gold backdrop stretching to the high ceiling, his image also projected on screens behind him, as member state representatives are seated at long rows of desks arrayed in front of the dais.

As U.N. Secretary-General Candidates Make Pitch to be Mediator-in-Chief, Will Peacebuilding End Up On the Cutting Room Floor?

A U.N. pivot back to conflict mediation, suggested in the secretary-general search, will only reap dividends if peacebuilding is high on the next leader's agenda.
Smoke and fire rises from the Dormition Cathedral in the Orthodox complex of the Kyiv Pechersk Lavra following a Russian missile strike on the Ukrainian capital Kyiv on June 15, 2026, amid the Russian invasion in Ukraine.

The Law of Armed Conflict and the Attack on Kyiv’s Monastery of the Caves and Dormition Cathedral

The strike illustrates a grim pattern in Russia’s conduct of the war – the systematic destruction of Ukrainian religious and cultural sites.

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?
A view of Daba Naira camp from a Solidarités International water tower as the sun sets over Tawila in North Darfur on February 22, 2026.

Sudan Has Become a Transnational Marketplace of Violence: Effective Responses Require Targeting the Sources

The most consequential drivers of the war in Sudan are foreign states, private military contractors, and transnational criminal networks.
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."
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