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| YEAR | DATE | EVENT | PRIME MINISTER |
| 1968 | South Africa Tswanaland Territory | Lawrence Lucas Manyane Mangope | |
| 1973 | 19 april | South Africa Bantustan | Lawrence Lucas Manyane Mangope |
| 1977 | 6 december | Republic | Lawrence Lucas Manyane Mangope |
| 1994 | 27 april | Union to South Africa |