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Soviet occupation of Eastern Poland 1939–1941

  • Territories of Poland annexed by the Soviet UnionEarly in the morning of the 24th of August 1939, the Soviet Union and Nazi Germany signed a ten-year non-aggression pact.
  • Soviet invasion of PolandThe Peace of Riga treaty signed on the 18th of March 1921 drew a new line between Poland and Soviet Russia. This agreement divided disputed territories after…
  • Katyn massacreOn the 17th of September 1939, the Red Army advanced into Poland with little resistance. Polish forces under orders from their own government did not engage…