Use of Force

Legal Scholar Oona Hathaway examines how expansive U.S. interpretations of "self-defense" have shaped international law.

Leading legal scholar Harold Hongju Koh presents a long-term strategy for ending the "war on terror."

Marking the 22nd anniversary of 9/11, our new Symposium reflects on the enduring legacies of the "war on terror" and prospects for finally leaving the war path.

On the 22nd anniversary of 9/11, leading legal scholar Harold Hongju Koh offers a grim diagnosis of how we got here and the challenges ahead.

The possibility of unilateral use of force spiraling into conflict in the Middle East should generate a sense of urgency on Capitol Hill for tackling war powers reform.

Florida governor and U.S. presidential candidate Ron DeSantis has proposed action that would flout constitutional and statutory limits.

What international law has to say about other States’ assistance to Russia’s war efforts

Tensions between Iran and the United States are escalating again following tit-for-tat hostilities in Syria.

The Russian operation almost certainly violated the international law obligation of due regard and, perhaps, the prohibition on using force. Nevertheless, the Biden administration…

The 2022 report illustrates the limits of congressionally mandated reporting requirements on matters of war and peace and the need for Congress to be more proactive in informing…

Some States are likely engaging in force by virtue of the quantity and quality of the support they are providing to Ukraine. Those activities are lawful as actions taken in the…

How can states pursue more ethical, value-based approaches to foreign policy amidst competing priorities and strategic realities?