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| | | 3000BC - 1000BC Bronze age culture at Ban Chiang | |
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| | 600 BC | Chinese T'ai migration recorded | |
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| | 300 BC | Indian settlements bringing the Hindu religion | |
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| | 1000 AD | The Mons, from Burma, had established themselves in Central Thailand | |
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| | 1150 | Suriyavarman II built Angkor Wat in today's Cambodia | |
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| | 1497 | July 8: Vasco da Gama set out on expedidition to India via Africa stopping at Mombasa, Mozambique, Malindi, Kenya, and Quilmana trading centres | |
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| | 1516 | Portuguese send an envoy to Thai Court and sign a treaty | |
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| | 1529 | War with Burma 1529 - 1569 | |
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| | 1571 | The Spanish settle in Manila to trade and spread Christianity | |
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| | 1575 | 1575 - 1650 The Dutch, French, Danish, Arabs, Chinese and British established trade agreements | |
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| | 1782 | Beginning of the Chakri dynasty under King Rama I | |
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| | 1833 | 1833 First American envoy to the Thai Court 1833 - 1847 Thai-Vietnam war | |
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| | 1868 | 1868-1910: Reign of King Chulalongkorn. | |
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| | 1905 | 1905 Slavery was abolished | |
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| | 1909 | 1909 Great Britain establishes protectorates | |
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| | 1914 | 1914 - 1918 WWI - Thailand joins the Allies | |
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| | 1917 | Siam becomes ally of Great Britain in World War I. | |
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| | 1932 | 1932 Revolution and the obsolete monarchy is abolished | |
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| | 1939 | Siam changes its name to Thailand ("Land of the Free"). | |
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| | 1939 | 1939 - 1945 WWII Thailand declares war on the Allies | |
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