The crisis on the Russia-Ukraine border continues to simmer. On February 5th American officials warned that Russia had gathered 70% of the forces that would be necessary for a full-scale invasion of Ukraine. A war “could happen as soon as tomorrow”, warned Jake Sullivan, America’s national security adviser, a day later. Emmanuel Macron, France’s president, visited Moscow on February 7th as part of a diplomatic blitz to stop it. But how large and unusual is Russia’s build-up?
