As rebel tanks trundled up the highway towards Moscow yesterday morning, Vladimir Putin labelled the mutinous mercenary leader Yevgeny Prigozhin a ‘traitor’ – and vowed to crush him. But hours later Putin capitulated, allowing Prigozhin to retire to an honourable exile in Belarus and pardoning the 25,000-strong Wagner force which had spent the day in open, armed rebellion against the Kremlin’s authority.