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| 1958, May 27 |
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| British colonial authorities and an all-party delegation from Singapore agreed to transform Singapore into a self-governing state before March 1959. | 1 |
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| 1959, June 3 |
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| Singapore became a self-governing state as the constitution came into effect, and Sir William Goode, the British governor, became head of state. | 2 |
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| Aug. 19 |
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| Malayan elections resulted in victory for the Alliance Party, the pro-Western group led by Tengku (Prince) Abdul Rahman. | 3 |
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| Dec. 3 |
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| The first Malayan-born head of the Singapore state, Inche Yusof bin Ishak, was installed. | 4 |
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