17.9.1939 - Soviet invasion of Poland

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

Western Ukrainian lands within Poland 1919–1939, 17.9.1939 - Soviet invasion of Poland , 1941-1944 - Nazi occupation of Ukraine, 1943 - Conflict between Poles and Ukrainians in Eastern Galicia and Volhynia, 8. 5. 1945 - End of WWII and 3 more anniversaries

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

8. 9. – 1. 11. 1944 - The battle of the Dukla Pass, 23. 2. 1949 – Beginning the forced agricultural collectivisation, 17.9.1939 - Soviet invasion of Poland , Western Ukrainian lands within Poland 1919–1939, Ukrainian insurgent movement 1930–1950

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, 30. 5. 1945 – 29. 10. 1946 - Withdrawal of Germans from Czechoslovakia, 10. 7. 1946 – Agreement on Volhynian Czechs option with the USSR and 3 more anniversaries

1. 9. 1939 - The outbreak of the WW2, 21. 8. 1968 - Invasion of the Warsaw Pact troops, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 10. 7. 1946 – Agreement on Volhynian Czechs option with the USSR, 17.9.1939 - Soviet invasion of Poland and 1 more anniversaries

Western Ukrainian lands within Poland 1919–1939, 17.9.1939 - Soviet invasion of Poland , 1941-1944 - Nazi occupation of Ukraine, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 8. 5. 1945 - End of WWII and 2 more anniversaries

Western Ukrainian lands within Poland 1919–1939, 17.9.1939 - Soviet invasion of Poland , 1941-1944 - Nazi occupation of Ukraine, 22. 6. 1941 – Operation Barbarossa - Nazi attack on the USSR, 1943 - Conflict between Poles and Ukrainians in Eastern Galicia and Volhynia and 4 more anniversaries

1. 9. 1939 - The outbreak of the WW2, 17.9.1939 - Soviet invasion of Poland , 1945 - 1946 Resettlement of Poles in the "Regained lands"