Numerous States, making statements before the UN Security Council or the UN General Assembly during the last resumption of its tenth Emergency Special Session, have recognized the right…

This is a deceptively simple question. It has several possible answers, each of which rests on different (and highly contested) assumptions. In this post I will try to…

Most questions on the law on the use of force surrounding the Russian invasion in Ukraine are straightforward. There is simply no plausible legal justification for the invasion,…

Yesterday Devika Hovell wrote an excellent post on this forum, rightly noting that the Security Council was not the body to deal with Russian aggression in…

Since late 2021, Russia has massed around 100,000 troops on the border with Ukraine, raising the specter of another use of force against its neighbor. The Russia-Ukraine crisis…

On 23 June 2021, multiple reports (here and here) suggested that the British warship HMS Defender sailing in the Black Sea en route to Georgia,…