The country has always been called Mueang Thai by its citizens.By outsiders prior to 1949, it was usually known by the exonym Siam (Thai: with the Sanskrit Śyāma (श्याम, meaning "dark" or "brown").
The Chinese called this region Xian, which the Portuguese converted into Siam." (Baker and Phongpaichit, A History of Thailand, 8) A further possibility is that Mon-speaking peoples migrating south called themselves 'syem' as do the autochthonous Mon-Khmer-speaking inhabitants of the Malay Peninsula. 1851–1868) reads SPPM (Somdet Phra Poramenthra Maha) Mongkut King of the Siamese, giving the name "Siam" official status until 24 June 1939 when it was changed to Thailand.
Popular uprising in 1973 was a result of internal conflict Thailand and leads to a brief period of parliamentary democracy which ended in 1976.
Thailand is still considered a "partial democracy" for many decades.
Since the 2000s seen the country pitted in a political crisis between supporters and opponents of ex-Prime Minister Thaksin Shinawatra, with two coups, most recently in 2014.
Its current and 20th constitution was ratified on April 6, 2017, during military junta's watch.