21. 8. 1968 - Invasion of the Warsaw Pact troops

1944 - 1945 - The liberation of Czechoslovakia, 19. 6. – 23. 6. 1948 – The Sokol Gathering, 21. 8. 1968 - Invasion of the Warsaw Pact troops

1. 9. 1939 - The outbreak of the WW2, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

21. 8. 1968 - Invasion of the Warsaw Pact troops, 6.-13. 12. 1980 Operation Krkonoše

14. 3. 1939 – The foundation of the Slovak State, 21. 8. 1968 - Invasion of the Warsaw Pact troops

21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period, 1. 1. 1977 - Declaration of Chart 77, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 28. 1. 1977 - The “Anti-Charter”

21. 8. 1968 - Invasion of the Warsaw Pact troops, 5. 1. - 21. 8. 1968 - The Prague Spring, 5. 4. 1968 – Formation of KAN (Club of Active Non-partisans)

5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops

25. 2. 1948 - Communist coup d‘état in ČSR, 21. 8. 1968 - Invasion of the Warsaw Pact troops

29. 8. 1944 - April 1945 - The Slovak National Uprising, 5. 1. - 21. 8. 1968 - The Prague Spring, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period, 31. 12. 1992 Dissolution of Czechoslovakia

21. 8. 1968 - Invasion of the Warsaw Pact troops