On 10 February 1948, Joseph Stalin welcomed the veteran communists Georgi Dimitrov and Edvard Kardelj to the Kremlin. The Red Army’s sweep across Eastern Europe had propelled Dimitrov to leadership of the newly established People’s Republic of Bulgaria after more than 20 years of exile in the USSR. Kardelj, meanwhile, was second-in-command to Josip Broz Tito, whose anti-fascist partisan movement had liberated Yugoslavia and replaced the country’s old kingdom with a communist-led ‘People’s Republic’. Joining them were countless other top-level officials from all sides.