22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 17.9.1939 - Soviet invasion of Poland , Western Ukrainian lands within Poland 1919–1939, 1941-1944 - Nazi occupation of Ukraine, Ukrainian insurgent movement 1930–1950 and 2 more anniversaries

1 November 1955 – 30 April 1975 - Vietnam War, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 26.8. 1980 Solidarity strike in Wroclaw , 25.3.1988 Candle demonstration in Bratislava, 17. 11. - 29. 12. 1989 - The Velvet Revolution in Czechoslovakia

1 November 1955 – 30 April 1975 - Vietnam War

2. 10. 1938 - Poland's annexation of Teschen area, September 1939- occupation of the entire Upper Silesia by Germany, 1. 9. 1939 - The outbreak of the WW2, 1944 - 1945 - The liberation of Czechoslovakia, 21. 8. 1968 - Invasion of the Warsaw Pact troops

1989 - The fall of the iron curtain

Ukraine in 1990-s., The Ukrainian declaration of independence in 1991, The Annexation of Crimea (February 2014), 2014 - first invasion of Russia into Ukraine, 2022 - full scale invasion of Russia into Ukraine