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| 1924, March 10 |
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| By treaty with Japan the latter power also gave up extraterritorial and tariff rights. | 1 |
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| 1925, Feb. 14 |
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| TREATY WITH FRANCE. France followed the example of the U.S. and Japan, gave up all special rights, arranged for arbitration of disputes, and finally agreed (Aug. 25, 1926) to the establishment of a demilitarized zone along the Indochinese frontier. Britain concluded a similar treaty on July 14, and the other European powers followed suit, so that by 1926 Siam had secured full jurisdiction and tariff autonomy. | 2 |
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| 1925–35 |
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| RAMA VII (Prajadhipok), king, succeeding his brother. He appointed a council of state, composed of five royal princes, to aid him in government, and at once initiated a policy of economy. | 3 |
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| 1927, March 25 |
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| With the ratification of the last treaties with the powers, the consular courts came to an end and the Siamese government established a new tariff. | 4 |
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| 1932, June 24 |
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| A coup d'etat put an END TO ABSOLUTE GOVERNMENT in Siam. The movement was organized by a group of young radicals, educated in Europe or imbued with European democratic theory, who formed a People's Party. The king, held captive for a short time, at once agreed to a constitution and the organization of a senate. The definitive constitution was adopted on Dec. 10: provision for popular sovereignty; the council of state, though appointed by the king, to be responsible to a national assembly, half the members of which were to be appointed while the other half were to be elected by universal (male and female) suffrage. This kept the pressure on the government to fulfill democratic ideals. Indirect elections were held in 1933 and 1937. | 5 |
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| 1933, April 3 |
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| Nevertheless, the king, convinced that the country would support him against the radicals, suspended the new constitution and set up a new council of state. | 6 |
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| June 20 |
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| This led to a new coup d'etat, led by Col. Phya Bahol Sena and other army officers. While affirming their loyalty to the king, they forced the resignation of his council of state and recalled the national assembly. Phya Bahol Sena became prime minister. | 7 |
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| Oct. 11 |
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| Attempted counterrevolution by a number of princes and nobles, led by Prince Bovaradet, failed; several of the leaders were captured and the others fled the country. | 8 |
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