Stalin's lead. During the 1930s and 1940s, the Soviet leadership sent NKVD squads into other countries to murder defectors and opponents of the Soviet regime. Victims of such plots included Yevhen Konovalets, Ignace Poretsky, Rudolf Klement, Alexander Kutepov, Evgeny Miller, Leon Trotsky, and the Workers' Party of Marxist Unification (POUM) leadership in Catalonia (e.g. Andréu Nin Pérez). Deportations Shortly before, during, and immediately after World War II, Stalin conducted a broad-scale series of deportations that profoundly affected the ethnic map of the Soviet Union. Separatism, resistance to Soviet rule, and collaboration with the invading Germans were the official reasons for the deportations. Individual circumstances of those spending time in German-occupied territories were not examined. After the brief Nazi occupation of the Caucasus, the entire population of five of the small highland peoples and the Crimean Tatars—more than a million people in total—were deported without notice or any opportunity to take their possessions. As a result of Stalin's lack of trust in the loyalty of particular ethnicities, ethnic groups such as the Soviet Koreans, Volga Germans, Crimean Tatars, Chechens, and many Poles, were forcibly moved out of strategic areas and relocated to places in the central Soviet Union, especially Kazakhstan in Soviet Central Asia. By some estimates, hundreds of thousands of deportees may have died en route. It is estimated that between 1941 and 1949, nearly 3.3 million were deported to Siberia and the Central Asian republics. By some estimates, up to 43% of the resettled population died of diseases and malnutrition. According to official Soviet estimates, more than 14 million people passed through the gulags from 1929 to 1953, with a further 7 to 8 million being deported and exiled to remote areas of the Soviet Union (including entire nationalities in several cases). The emergent scholarly consensus is that from 1930 to 1953, around 1.5 to 1.7 million perished in the gulag system. In February 1956, Nikita Khrushchev condemned the deportations as a violation of Leninism and reversed most of them, although it was not until 1991 that the Tatars, Meskhetians, and Volga Germans were allowed to return en masse to their homelands. The deportations had a profound effect on the people of the Soviet Union. The memory of the deportations has played a significant part in the separatist movements in the Baltic states, Tatarstan, and Chechnya, even today. Economic policy At the start of the 1930s, Stalin launched a