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It would be wrong to say Russia’s full-scale invasion of Ukraine, four years ago this week, came out of the blue. For months there had been worrying reports of a huge build-up of Russian troops on Ukraine’s border. Through the winter of 2021/22, Moscow scoffed at suggestions it was planning to invade its neighbour as “alarmist”. But at the same time the Russian president, Vladimir Putin, was making aggressive noises, issuing demands for Nato to pull its troops back from its eastern front and calling for a ban on Ukraine’s accession to the western alliance.

And on February 21, he made a speech in which he called Ukraine “an inalienable part of our own history, culture and spiritual space” which had been taken over by a neo-Nazi “puppet regime” that should be removed.

Still, it was a shock to wake in the early hours of Thursday February 22 to learn that Putin had launched what he called a “special military operation … to protect people who have been subjected to abuse and genocide by the Kyiv regime for eight years”. Images began to emerge of tanks and armoured vehicles with the now-familiar “Z” (a Russian victory symbol) streaming across the borders from Russia and Belarus, the latter the shortest route to the Ukrainian capital Kyiv.

Four years and about 1.8 million casualties later, Russia has gained about 75,000sq km of territory, about 12% of Ukraine to add to the 7% it had occupied since it annexed Crimea and parts of eastern Ukraine in 2014. The war has developed into a “meat-grinder” – Russia’s advances have been glacially slow and very costly, an estimated 78 casualties per square kilometre in 2025.

But if, as many insist, the war on the battlefield itself has slowed into something resembling a stalemate, the geopolitical shifts that have accompanied the conflict have been considerable – particularly since Donald Trump was elected for a second term as US president, promising to end the conflict, “in a single day”. Of course, like many of his campaign promises this has proved to be pie in the sky, but the US president’s cordial relations with Putin, his decision to curtail US financial aid to Kyiv and his........

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