22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR

17.9.1939 - Soviet invasion of Poland , 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 20. 6. - 29. 8. 1944 - Operation Bagration

22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 1944 - 1945 - The liberation of Czechoslovakia, 8. 9. – 1. 11. 1944 - The battle of the Dukla Pass

3.9.1942 - 2.2.1943 Battle of Stalingrad, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 1944 - 1945 - The liberation of Czechoslovakia

29. 8. 1944 - April 1945 - The Slovak National Uprising, 1. 9. 1939 - The outbreak of the WW2, 8. 9. – 1. 11. 1944 - The battle of the Dukla Pass, 1944 - 1945 - The liberation of Czechoslovakia, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR

29. 9. 1938 - The Munich Diktat, 15. 3. 1939 - The Nazi occupation of ČSR, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR

8. 9. – 1. 11. 1944 - The battle of the Dukla Pass, 1944 - 1945 - The liberation of Czechoslovakia, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 17.9.1939 - Soviet invasion of Poland , 8. 5. 1945 - End of WWII and 3 more anniversaries

21. 8. 1968 - Invasion of the Warsaw Pact troops, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 17.9.1939 - Soviet invasion of Poland , 1940 - 1941 - Deportations of Poles to USSR , 1941-1944 - Nazi occupation of Ukraine and 1 more anniversaries

Ukrainian insurgent movement 1930–1950, 1939 - 1941 - The first Soviet occupation of Galicia, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 1943 - Conflict between Poles and Ukrainians in Eastern Galicia and Volhynia

22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR

29. 9. 1938 - The Munich Diktat, 15. 3. 1939 - The Nazi occupation of ČSR, 1. 9. 1939 - The outbreak of the WW2, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 13. 8. – 31. 10. 1940 - The Battle of Britain and 2 more anniversaries