University professor

21. 8. 1968 - Invasion of the Warsaw Pact troops, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia, 31. 12. 1992 Dissolution of Czechoslovakia

30. 5. 1953 – 3. 6. 1953 – The monetary reform and subsequent public upheaval

21. 8. 1968 - Invasion of the Warsaw Pact troops, 16. 1. 1969 – Jan Palach´s self-immolation , 17. 4. 1969 – A. Dubček’s resignation, start of the “normalisation” period, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

Ukraine in 1990-s., The Orange Revolution of 2004, The Revolution of Dignity (21.11. 2013 – 22.02. 2014), 2014 - first invasion of Russia into Ukraine, 2022 - full scale invasion of Russia into Ukraine