26 April 1986 - Chernobyl disaster, Dissolution of the Soviet Union, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 25. 2. 1948 - Communist coup d‘état in ČSR, 8. 5. 1945 - End of WWII and 27 more anniversaries

1945 - 1946 Resettlement of Poles in the "Regained lands"

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

1989 - The fall of the iron curtain

September 1939- occupation of the entire Upper Silesia by Germany, March 1945 - the occupation of Upper Silesia by the Soviet army, 8. 5. 1945 - End of WWII, 21. 8. 1968 - Invasion of the Warsaw Pact troops

September 1939- occupation of the entire Upper Silesia by Germany, March 1945 - the occupation of Upper Silesia by the Soviet army, 8. 5. 1945 - End of WWII

Western Ukrainian lands within Poland 1919–1939, 1939 - 1941 - The first Soviet occupation of Galicia, Lviv in the times of the Second World War 1939-1945, 1. 9. 1939 - The outbreak of the WW2

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

1945 - 1946 Resettlement of Poles in the "Regained lands"

26.8. 1980 Solidarity strike in Wroclaw