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| 1948 | Nouth, Samdech Penn |  |
| Appointed Prime Minister of Cambodia, 1st term |
| 1949 | Sambaur, Yem | |
| Appointed Prime Minister of Cambodia |
| 1950 | Monipong, Samdech Krom Luong Sisovath | |
| Appointed Prime Minister of Cambodia |
| 1951 | Kanthoul, Huy | |
| Appointed Prime Minister of Cambodia |
| 1951 | Sun, Oum Chheang | |
| Appointed Prime Minister of Cambodia, 1st term |
| 1952 | Sihanouk | |
| Appointed Prime Minister of Cambodia, 1st term |
| 1953 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 2nd term |
| 1953 | Sihanouk | |
| Sihanoukville Abolishes the National Assembley |
| 9th Nov Sihanoukville Frances concedes Cambodia's independence |
| 1954 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 3rd term |
| 1955 | Ngeth, Leng | |
| Appointed Prime Minister of Cambodia |
| 1955 | Sihanouk | |
| Sihanoukville Abdicates as King |
| Appointed Prime Minister of Cambodia, 2nd term, 1955-1956 |
| 1956 | Sihanouk | |
| Appointed Prime Minister of Cambodia, 3rd term, 1956 |
| Appointed Prime Minister of Cambodia, 4th term, 1956 |
| Appointed Prime Minister of Cambodia, 5th term, 1956 |
| 1956 | Sun, Oum Chheang | |
| Appointed Prime Minister of Cambodia, 2nd term |
| 1956 | Tit, Khim | |
| Appointed Prime Minister of Cambodia |
| 1956 | Yun, Sam | |
| Appointed Prime Minister of Cambodia |
| 1957 | Sihanouk | |
| Appointed Prime Minister of Cambodia, 6th term, 1957 |
| 1957 | Var, Sim | |
| Appointed Prime Minister of Cambodia, 1st term |
| 1958 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 4th term |
| 1958 | Oun, Ek Yi | |
| Appointed Prime Minister of Cambodia |
| 1958 | Sihanouk | |
| Appointed Prime Minister of Cambodia, 7th term, 1958-1960 |
| 1958 | Var, Sim | |
| Appointed Prime Minister of Cambodia, 2nd term |
| 1960 | Proeung, Pho | |
| Appointed Prime Minister of Cambodia |
| 1961 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 5th term |
| 1961 | Sihanouk | |
| Appointed Prime Minister of Cambodia, 8th term, 1961-1962 |
| 1962 | Chhum, Chau Sen Coscal | |
| Appointed Prime Minister of Cambodia |
| 1962 | Kanthoul | |
| Appointed Prime Minister of Cambodia |
| 1962 | Tioulong, Nhiek | |
| Appointed Prime Minister of Cambodia |
| 1966 | Lon, Mol | |
| Appointed Prime Minister of Cambodia, 1st term |
| 1966 | Nol, Lon | |
| Appointed Prime Minister of Cambodia, 1st term |
| 1967 | Sann, Son | |
| Appointed Prime Minister of Cambodia |
| 1968 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 6th term |
| 1969 | Lon, Mol | |
| Appointed Prime Minister of Cambodia, 2nd term |
| 1969 | Nol, Lon | |
| Appointed Prime Minister of Cambodia, 2nd term |
| 1970 | Lon, Mol | |
| Appointed Prime Minister of Cambodia, 3rd term |
| 1970 | Nol, Lon | |
| Phnom Penh Declares a Republic |
| 18th Mar Phnom Penh Leads a coup which deposes Sihanouk |
| 18th Mar Phnom Penh Lon Nol is granted emergency powers |
| 18th Mar Phnom Penh The National Assembly is convened & votes unanimously to depose Sihanouk |
| 9th April Sihanoukville Closes the port at Sihanoukville to Nth Vietnam & requests modern weapons from the US |
| 9th April Phnom Penh Seeks an alliance with the USA |
| 1970 | Sihanouk | |
| Beijing Allies with the extreme wing of the Khmer Rouge & forms a Government in exile |
| 1971 | Matak, Sisovath Sirik | |
| Appointed Prime Minister of Cambodia |
| 1972 | Hak, Hang Thun | |
| Appointed Prime Minister of Cambodia |
| 1972 | Lon, Mol | |
| Appointed President of the Khmer Republic |
| 1972 | Nol, Lon | |
| Appointed Prime Minister of Cambodia, 3rd term |
| Phnom Penh Suspends the constitution |
| 1972 | Thanh, Son Ngoc | |
| Appointed Prime Minister of Cambodia |
| 1973 | Boreth, Long | |
| Appointed Prime Minister of Cambodia |
| 1973 | Tam, In | |
| Appointed Prime Minister of Cambodia |
| 1975 | Nol, Lon | |
| 1st April Flees to Hawaii after defeat by the Khmer Rouge |
| 1975 | Nouth, Samdech Penn | |
| Appointed Prime Minister of Cambodia, 7th term |
| 1976 | Samphan, Khieu | |
| Appointed Prime Minister of Cambodia |
| 5th Jan Phnom Penh Anew constitution comes into effect in Democratic Kampuchea |
| 1979 | Samrin, Heng | |
| The Peoples Republic of Kampuchea is established under Samrin by the Vietnamese |
| 1979 | Sen, Hun | |
| Appointed Foreign Minister |
| 1981 | Sovan, Pen | |
| Phnom Penh Appointed Chairman of the Council of Ministers |
| 1982 | Sihanouk | |
| Appointed President of the Coalition Government of Democratic Kampuchea |
| 1982 | Sy, Chan | |
| Phnom Penh Appointed Chairman of the Council of Ministers |
| 1985 | Sen, Hun | |
| Phnom Penh Appointed Chairman of the Council of Ministers |
| Appointed Prime Minister of Cambodia |
| 1991 | Sen, Hun | |
| Phnom Penh A peace accord between China & the United Nations ends 13 yrs of civil war in Cambodia |
| Phnom Penh Cambodia is ruled by the UN Trans itional Authority in Cambodia until elections 1993 |
| 1993 | Ranariddh | |
| Appointed Prime Minister of Cambodia |
