Use of Force

As Russia’s war against Ukraine rages, inflicting suffering on the country, its people, and economy, the Russian Central Bank (RCB) assets remain immobilised (i.e., frozen). Since December 2025, the EU, on whose territory a significant chunk of these assets has been immobilised, – €210 bn worth of assets out of approximately €290 bn  – modified the legal…

The paradoxical revival of security guarantees Russia’s full-scale invasion of Ukraine in 2022 has revived the concept of security guarantees. Their content and scope have been central to scholarly and political debates about Kyiv’s resistance to the Russian aggression (see here and here). Yet, this revival highlights a…

While peace still appears remote, the prospect of a negotiated end to the war in Ukraine raises difficult questions concerning the international law governing inter-state peace treaties. The unlawfulness of Russia’s use of force and the peace plans proposed to date point to issues of validity, particularly under Articles 46, 52 and 53 of the Vienna Convention…

In the four years since Russia’s 2022 invasion of Ukraine, the prospects of a negotiated peace settlement have waxed but mostly waned. But the possibility of an agreement has been an ongoing focus for international lawyers. This is primarily because Russia has demanded territorial concessions from Ukraine that appear at odds with…