Jus ad Bellum

Analysis of laws of war and law on the resort to armed force in U.S. military action against Tren de Aragua.

Former State Department attorney analyzes U.S. letter to UN Security Council that presented legal arguments for U.S. strike on Iran's nuclear facilities.

Part of our ongoing series on the Israel-Iran war.

"Another legal framework – the ongoing armed conflict framework – is more factually and legally viable than the anticipatory or preventive self-defense frameworks."

Analysis of jus ad bellum with Israel’s stated objectives for its current military operations in Gaza.

Understanding jus ad bellum necessity and proportionality is crucial to addressing concerns regarding the weaponization of outer space.

The President should understand that bellicose threats and unreliability as an ally may leave the United States poorer and more vulnerable on his watch and will frustrate his nuclear…

We may be effectively reverting, at least temporarily, to an era of imperial rule. But history has demonstrated that international law has a long memory. Lawyers and historians…

The current round of retaliatory strikes between Israel and Iran casts light on Israel's and Iran’s opposing political strategies, which also have significant legal implications…

The UN Charter, the law on the use of force, and the conditions that body of law places on Ukraine's military operation in Russia's Kursk Oblast.

Nine factors, considered in their totality, would provide a more nuanced understanding of jus ad bellum proportionality and assist States in identifying specific concerns with…

A right to rebellion offers a way to recognize grievances and deescalate the violence of armed groups, and affirms the place of international law in holding States to account for…