Out on the frontline, near the eastern Ukrainian city of Lyman, on 8 November at 15.10, a Russian serviceman called Andrey decided to ignore the orders of his superiors and call his mother with an unauthorised mobile phone. “No one feeds us anything, mum,” he complained. “Our supply is s**t, to be honest. We draw water from puddles, then we strain it and drink it.” Russian forces had been on the back foot in the Donetsk oblast for weeks. Lyman, taken by the Russians in May, was liberated by Ukrainian forces in October. Two days before Andrey made his afternoon...