When Russia’s invasion of Ukraine began in the early hours of 24 February, with mass missile strikes and the advance of a land force from several directions, many key Ukrainian officials were apparently caught by surprise. Some were fast asleep. There had been rumours of a Russian invasion for weeks, and the previous evening US and Ukrainian intelligence received information that pointed to an invasion that night with almost certainty. Yet there was little in the way of last-minute efforts to fortify towns close to the border, or to warn citizens to brace for the inevitable. President Volodymyr Zelenskiy was...