What Maclean had witnessed was just one episode in a vast programme of ethnic deportation that modern historians have only recently rediscovered. On October 29, 1937, Nikolai Yezhov, the head of the NKVD, wrote to inform Vyacheslav Molotov, Chairman of the Council of People's Commissars, that all Koreans in the Soviet Far East - a total of 171,781 people - had been deported to Central Asia, the consummation of plans first contemplated in the mid-1920s as a way of securing the Soviet Union's eastern frontier. Koreans were only the first ethnic group to come under suspicion. Balkars, Chechens, Crimean Tatars, Germans, Greeks, Ingushi, Meskhetians, Kalmyks, Karachai, Poles and Ukrainians - all these different nationalities were subjected to persecution by Stalin at various times.
Niall Ferguson, The War of the World: Twentieth-Century Conflict and the Descent of the West (2006), p. 215