21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

1. 1. 1977 - Declaration of Chart 77, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

23. 2. 1949 – Beginning the forced agricultural collectivisation, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 16. 1. 1969 – Jan Palach´s self-immolation , 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

29. 9. 1938 - The Munich Diktat, 5. – 9. 5. 1945 - Prague Uprising, 25. 2. 1948 - Communist coup d‘état in ČSR, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

25.3.1988 Candle demonstration in Bratislava

21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

2014 - first invasion of Russia into Ukraine, 2022 - full scale invasion of Russia into Ukraine, 26 April 1986 - Chernobyl disaster, Perestroika, The Annexation of Crimea (February 2014) and 1 more anniversaries

2014 - first invasion of Russia into Ukraine, 2022 - full scale invasion of Russia into Ukraine, Perestroika, The Revival of Ukrainian national culture 1989 - 1991, Ukraine in 1990-s. and 2 more anniversaries

Ukraine in 1990-s., Perestroika, The Revival of Ukrainian national culture 1989 - 1991, The Orange Revolution of 2004, The Revolution of Dignity (21.11. 2013 – 22.02. 2014) and 2 more anniversaries