Use of Force
239 Articles

Just Security’s Israel-Hamas War Archive
Just Security's collection of more than 110 articles covering the Israel-Hamas War and its diplomatic, legal, and humanitarian consequences.

Self-Preservation and the Erosion of International Law
It is the violation of fundamental principles of international law that ultimately constitutes an existential threat to all members of the international community.

An Unserious Justification for an Unnecessary War: Assessing the U.S. “Article 51” Letter to U.N. on Iran War
Former US State Department attorney writes that the United States' "Article 51" letter to the UN Security Council fails to identify legal basis for Iran attack.

Did the United States Just Bomb Ecuador?
The U.S. military continues maritime strikes on alleged drug smugglers and may now be hitting targets on land. Brian Finucane analyzes Trump’s latest War Powers report.

Operation Epic Fury: Reports of the Death of International Law are Greatly Exaggerated
"I am sure some restrictionists will critique my analysis by claiming it is not grounded in orthodox interpretations of international law."

Aggression, Plain and Simple: A Response to Shany and Cohen on the Attack on Iran
Legal academics debate the state of international law and international institutions in light of the US-Israel-Iran War.

Sinking Iran’s Frigate IRIS Dena and the Law of Naval Warfare
Legal explainer concerning the location of the Iranian vessel, the attack itself, and the U.S. submarine's lack of attempted rescue.

The International Community at a Crossroads Over Iran: The reawakening of “illegal but legitimate” or the “law of self-preservation”?
"The tensions we have identified are particularly acute when a State faces an existential threat and, as in here, from an enemy long committed to radically unlawful behavior."

The United Kingdom’s Use of Force Against Iran: Walking a Legal Tightrope?
An assessment of the United Kingdom's ability to maintain a legal line between defensive versus offensive operations against Iran.

Double Preemption, Imminence, and the U.S. Attack Against Iran
Secretary of State Marco Rubio’s argument that Operation Epic Fury was an act of preemptive self-defense is not credible and does not satisfy the necessary precondition.

Top Questions the Trump Administration Needs to Answer on War with Iran
What Congress, journalists, and the public should ask the Trump administration about its war in Iran.

Aggression by the United States and Israel, Misdirected Self-Defense by Iran, and Collective Self-Defense of Gulf States
Analysis of the legality of U.S.-Israel actions against Iran, Iran’s response, and third-party states’ legal options and obligations under the UN Charter.