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The presence of Soviet troops in Eastern Europe and the reshaping of Europe's internal borders sped up the separation between the Eastern and Western blocs in the first years after the end of the Second World War. In countries where communism had been declared illegal or lacked the support of the electorate before 1944, the accession of communist leaders to governmental structures had been advanced by the politics of the Soviet Union, based on systematised political intimidation, institutionalised violence, and blackmail. The communist authorities then legitimised their political positions in relation to the historical past of their countries and according to the development of their societies after the Second World War.
Lucían N. Leustean (Thu,) studied this question.