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| 1900 | Birth Bulgaria Chervenkov, Vulko Velev |  |
| 6th Sep Birth of Vulko Velev Chervenkov |
| 1919 | Communist Party Bulgaria Dimitrov, Georgi Mikhailovich | |
| Helps found the Bulgarian Communist Party |
| 1921 | Comintern Bulgaria Dimitrov, Georgi Mikhailovich | |
| Elected to the executive committee of the Comintern |
| 1923 | Exile of Dimitrov Bulgaria Dimitrov, Georgi Mikhailovich | |
| Exiled after leading a rebellion in Bulgaria |
| 1929 | Head Comintern Section Dimitrov Bulgaria Dimitrov, Georgi Mikhailovich | |
| Berlin Appointed Head of the European section of the Comintern in Berlin |
| 1933 | Plot Bulgaria Dimitrov, Georgi Mikhailovich | |
| Berlin Accused with the Communists of the Reichstag |
| Berlin Wins worwide fame when acquitted of the Reichstag fire |
| 1935 | General Secretary Bulgaria Dimitrov, Georgi Mikhailovich | |
| Appointed secretary general of the Comintern in Moscow |
| 1950 | Prime Minister Bulgaria Chervenkov, Vulko Velev | |
| 1st Feb Appointed Prime Minister of Bulgaria |
| 1951 | Purge Bulgaria Chernenkov, Vulko | |
| Bucharest 17 Central Committee members are purged |
| Bucharest Purges include the Deputy Prime Minister Kostov & Prime Minister Vulko Chervenkov |
| 1954 | Party Leader Bulgaria Zhivkov, Todor | |
| Appointed Pary Leader of the Communist Party |
| 1962 | Minister of Foreign Affairs Bulgaria Mladenov, Petur | |
| Appointed Foreign Minister |
| 1962 | Prime Minister Bulgaria Zhivkov, Todor | |
| Appointed Prime Minister of Bulgaria |
| 1971 | President Bulgaria Zhivkov, Todor | |
| Appointed President of Bulgaria |
| 1980 | Death Bulgaria Chervenkov, Vulko Velev | |
| 21st Oct Death of Vulko Velev Chervenkov |
| 1989 | Constitution Bulgaria Mladenov, Petur | |
| Bucharest Averts revolution by introducing political pluralism & free elections |
| 10th Nov Bucharest Appointed Party Leader of the Bulgarian Communist Party |
| 10th Nov Appointed President of Bulgaria |
