Poland

17.9.1939 - Soviet invasion of Poland , 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 20. 6. - 29. 8. 1944 - Operation Bagration

8. 5. 1945 - End of WWII, 12.1.1945 - 13.2.1945 Vistula–Oder Offensive

18. 4. - 10. 5. 1945 - osvobození západní části ČSR americkou armádou, 23. 2. 1949 – Beginning the forced agricultural collectivisation, 21. 8. 1968 - Invasion of the Warsaw Pact troops

8. 5. 1945 - End of WWII, 12.1.1945 - 13.2.1945 Vistula–Oder Offensive

1. 9. 1939 - The outbreak of the WW2, 17.9.1939 - Soviet invasion of Poland , 1945 - 1946 Resettlement of Poles in the "Regained lands"

17.9.1939 - Soviet invasion of Poland

21. 8. 1968 - Invasion of the Warsaw Pact troops, Vznik nezávislého odborové hnutí Solidarita, Výjimečný stav v Polsku, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

8. 5. 1945 - End of WWII, 12.1.1945 - 13.2.1945 Vistula–Oder Offensive