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Thailand History Timeline

1000 - 1400
  • (1000 - 1099) Thais began moving from southern China to (present day) Thailand
  • (1350) Unified Thai Kingdom established by King Ramathibodi; area was called Siam
  • (1350 - 1767) Thailand gradually came under control of Ayutthaya Kingdom, became major power in southeast Asia, including parts of Cambodia, Laos, Burma
  • (1448) King Ramesuan unified Ayutthaya and north central Thailand's Sukhothai Kingdoms
1500 - 1700
  • (1590 - 1605) King Naresuan ruled, considered to be Ayutthay's greatest king; ended Burmese overlordship
  • (1688) Siamese people ousted French from Bangkok and Siam in Siege of Bangkok
  • (1767) Burmese invaded capital city of Ayutthaya, left it in ruins
  • (1768 - 1782) Thonburi Kingdom reestablished Thai control under Taksin the Great
  • (1782) Taksin ousted by coup led by General Chao Phraya Chakri
  • (1782) Chakri Dynasty under King Rama I began, country named Siam, Bangkok became capital
1800s
  • (1804 - 1868) King Rama IV initiated modernization of Thailand
  • (1820) Cholera pandemic killed around 30,000 in Bangkok
  • (1828) Siamese forces invaded Laos
  • (1868) King Roma IV died, son Chulalongkorn (Rama V) took over
  • (1868 - 1910) During reign of King Rama V, Siam's administration and commerce were modernized, railway developed
  • (1893) During Franco-Siamese War, three French ships were fired on by Siamese, France won battle, blocked Bangkok, ended the war
  • (1896) Siam ceded Laos to France
1900s
  • (1902) Siam annexed three southern provinces that had been part of Kingdom of Pattani
  • (1910) King Rama V's reign ended, son Vajiravudh succeeded as Rama VI
  • (1917) In World War I, Siam became ally of Great Britain
  • (1925) King Rama VI died, Prince Prajadhipok became King Rama VII
  • (1932) Bloodless coup ended absolute monarchy, Siam became constitutional monarchy
  • (1935) King Rama VII abdicated due to political quarrels with new government and health problems
  • (1935) Nine-year old Ananda Mahidol named King Rama VIII; Parliament appointed Colonel Prince Anuwatjaturong, Lieutenant Commander Prince Artit Thip-apa, Chao Phraya Yommaraj (Pun Sukhum) as his regents
  • (1941) Japanese forces landed; Thailand allowed them to advance toward British-controlled Malay Peninsula, Singapore, Burma
  • (1942) Thailand declared war on Britain and US; Thai Ambassador refused to declare declaration of war to US government in Washington
  • (1945) World War II ended; Thailand forced to return territories seized from Laos, Cambodia, Malaya
  • (1946) King Ananda was assassinated, brother Bhumibol Adulyadej became king
  • (1946) Thailand became member of United Nations
  • (1947) Pro-Japanese leader, Phibun Songkhram, staged military coup
  • (1960s - 1970s) Thailand was involved in conflicts in Cambodia and Vietnam
  • (1960s - 1970s) US was allowed to use military bases in Thailand during Vietnam war
  • (1960s - 1970s) Thai troops fought in South Vietnam
  • (1973) Students rioted in Bangkok resulting in fall of military government
  • (1973) Free elections held, new government lacked stability
  • (1976) Students demonstrating at Thammasat University against return of military ruler, Thanom Kittikachorn, were shot, beaten, bodies mutilated; 46 died

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This page was last updated on April 7, 2017.