Thailand, formerly known as Siam, is a Southeast Asian country located on the Indochinese Peninsula. It shares borders with Myanmar, Laos, Cambodia, and Malaysia, and maritime borders with Vietnam, Indonesia, and India. Its capital and largest city is Bangkok. Thailand's population is approximately 66 million, and it covers an area of 513,115 square kilometers.
In 1905, there were unsuccessful rebellions in the ancient Patani area, Ubon Ratchathani, and Phrae in opposition to an attempt to blunt the power of local lords.
Thailand's first census in 1909 found the population to be 8.2 million.
In 1910, Vajiravudh began his reign (1910–1925), responding to the Palace Revolt with propaganda to promote the Thai nation.
The reign of Chulalongkorn (Rama V) ended in 1910. During his reign from 1868-1910, the Siamese system of government was centralised and transformed into a modern unitary absolute monarchy.
In 1912, the Palace Revolt occurred, a failed attempt by Western-educated military officers to overthrow the Siamese monarchy.
Vajiravudh's reign ended in 1925, having begun in 1910 after the failed Palace Revolt.
On June 24, 1932, Khana Ratsadon (People's Party) carried out a bloodless revolution which marked the beginning of constitutional monarchy in Thailand.
In 1932, a bloodless revolution forced Prajadhipok to grant the country's first constitution, ending centuries of feudal and absolute monarchy in Siam.
In 1932, a bloodless revolution transitioned Siam into a constitutional monarchy, and the country changed its official name to Thailand.
In 1973, Bhumibol installed Sanya Dharmasakti to replace Thanom Kittikachorn marking the first time that the king had intervened in Thai politics directly since 1932.
In 1933, a counter-revolutionary rebellion aimed to reinstate absolute monarchy failed, leading to Prajadhipok's abdication and the selection of Ananda Mahidol as the new king.
In 1938, Plaek Phibunsongkhram became premier, initiating political oppression and anti-royalist policies in Siam.
On June 24, 1939, the name Siam was officially changed to Thailand.
Before 1939, Thailand was known as Siam to outsiders.
In 1939, Siam was officially renamed to Thailand.
On December 8, 1941, the Empire of Japan launched an invasion of Thailand, leading to fighting and eventually a military alliance between Thailand and Japan.
In 1941, Thailand engaged in a brief conflict with Vichy France, resulting in Thailand gaining some Lao and Cambodian territories.
After World War II ended in 1945, Thailand signed formal agreements to end the state of war with the Allies.
In June 1946, the young King Ananda was found dead under mysterious circumstances, leading to his younger brother Bhumibol Adulyadej ascending to the throne.
Between 1946 and the 1980s, military and bureaucratic aristocrats fully controlled political parties in Thailand.
In 1954, Thailand joined the Southeast Asia Treaty Organization (SEATO) to become an active ally of the United States.
The Lumpinee Boxing Stadium originally sited at Rama IV Road near Lumphini Park first opened in December 1956.
In 1957, Field Marshal Sarit Thanarat launched a coup, removing Khana Ratsadon from politics.
In 1959, Sarit Thanarat began his rule as prime minister, lasting until 1963, during which he built his legitimacy around the monarch's god-like status.
Thailand's government-sponsored family planning programme resulted in a dramatic decline in population growth from 3.1% in 1960.
Between 1962 and 1983, Thailand's agricultural sector experienced an average growth of 4.1% per year.
In 1963, Sarit Thanarat's rule as prime minister ended, having begun in 1959, during which he built his legitimacy around the monarch's god-like status.
In 1963, Thanom Kittikachorn began his premiership, which ended in 1973.
The Thailand national basketball team had its most successful year at the 1966 Asian Games where it won the silver medal.
In 1970, an average of 5.7 people lived in a Thai household.
In October 1971, there was a large demonstration against the dictatorship of Thanom Kittikachorn (premiership 1963–1973), which led to civilian casualties.
The Thailand national football team played the AFC Asian Cup six times and reached the semifinals in 1972.
In 1973, Bhumibol installed Sanya Dharmasakti (premiership 1973–1975) to replace Thanom Kittikachorn marking the first time that the king had intervened in Thai politics directly since 1932.
In 1975, Sanya Dharmasakti premiership ended, having begun in 1973.
In October 1976, the Thammasat University massacre occurred, followed by a coup d'état that brought Thailand a new ultra-right government.
In 1988 Thailand had its first elected prime minister since 1976.
In 1977, SEATO (Southeast Asia Treaty Organization), of which Thailand was a member, was disbanded.
In 1978, a more moderate government offered amnesty to communist fighters in Thailand.
From 1980 to 1988, Prem Tinsulanonda became the Prime Minister.
In 1980, 70% of Thailand's labor force was employed in agriculture.
In 1981, there was a failed coup attempt against Prem Tinsulanonda.
Between 1962 and 1983, Thailand's agricultural sector experienced an average growth of 4.1% per year, and continued to grow at 2.2% between 1983 and 2007.
By 1983, the communists in Thailand abandoned the insurgency.
In 1985, another failed coup attempt occurred against Prem Tinsulanonda.
In 1988, Thailand had its first elected prime minister since 1976.
It is estimated that between 1988 and 1995, the number of factory workers in the country doubled from two to four million, as Thailand's GDP tripled.
In 1989, the government of Thailand banned the use of elephants for logging, leading many elephant owners to move their domesticated animals to the tourism industry.
In the 1990 census, 29.4% of Thailand's population lived in urban areas.
In 1991, Suchinda Kraprayoon led a coup.
In 1991, the National Government Organisation Act, BE 2534 divided the administrative services of the executive branch into three levels: central, provincial and local.
Between 1992 and 2006, Thailand had a two-party system.
In 1992, Suchinda Kraprayoon's nomination as prime minister caused a popular demonstration in Bangkok, which ended with a bloody military crackdown.
Between 1993 and 1995, ten per cent of the Thai labour force moved from the agricultural sector to urban and industrial jobs.
On September 27, 1994, the Mass Rapid Transit Master Plan in Bangkok Metropolitan Region was endorsed by the cabinet.
Between 1993 and 1995, ten per cent of the Thai labour force moved from the agricultural sector to urban and industrial jobs.
In 1995, Sukavich Rangsitpollaid, as minister of education, let out his plans for educational reform in Thailand.
In 1995, the Mass Rapid Transit Master Plan in Bangkok Metropolitan Region was implemented.
Around 1997, the largest ethnic groups included Lao, Khon Muang, Pak Tai, Khmer Leu, Malay, Nyaw, Phu Thai, Kuy/Kuay, and Karen.
In 1997, the Asian financial crisis hit the Thai economy hard, leading to widespread deregulation and structural adjustment reforms mandated by the IMF and World Bank.
Twenty million Central Thai made up approximately 20,650,000 (34.1 per cent) of the state's population of 60,544,937 at the time of completion of the Mahidol University Ethnolinguistic Maps of Thailand data in 1997.
Thailand's recovery from the 1997–1998 Asian financial crisis depended mainly on exports and other factors.
Thammasat Stadium in Bangkok was built for the 1998 Asian Games.
In 1999, the number of international degree students in Thailand was 1,882.
In the 2000 census, 31.1% of Thailand's population lived in urban areas.
The earliest evidence of rice growing in present-day Thailand is dated at 2,000 BCE.
From 2001, the populist Thai Rak Thai party, led by prime minister Thaksin Shinawatra, governed.
In 2002, Bumrungrad became the first hospital in Asia to meet the Joint Commission International standard.
One estimate published in 2003 placed Thailand's sex trade at US$4.3 billion per year, approximately 3% of the Thai economy.
Ong-Bak: Muay Thai Warrior, starring Tony Jaa, was released in 2003.
In September 2004, Thailand ended its participation in the US-led invasion of Iraq, sending a humanitarian contingent until then.
From 2004, prime minister Thaksin Shinawatra faced criticism over his response to a South Thailand insurgency which escalated.
In 2004, Shutter was released as one of the best-known Thai horror movies.
The 2004 Indian Ocean earthquake and tsunami hit Thailand, mostly in the south, claiming around 5,400 lives.
In 2005, Thai annual defense budget was US$1.98 billion.
In 2005, Tom-Yum-Goong, starring Tony Jaa, was released.
Thailand became the first country in the world to host an international 80 welterweight rugby tournament in 2005.
Bank of Thailand reported that during 2006–16, Thailand's top 5% largest companies had 85% of all corporate revenue in the nation.
Between 1992 and 2006, Thailand had a two-party system, however, later constitutions created a multi-party system where a single party cannot gain a majority in the house.
In 2006, a coup d'état took place in Thailand, part of an ongoing political conflict.
In 2006, the military staged a coup d'état, dissolving Thaksin's party and banning over a hundred of its executives from politics. This action followed a period of political instability and protests against Thaksin's leadership, leading to the installation of a military government for a year.
The populist Thai Rak Thai party, led by prime minister Thaksin Shinawatra, governed from 2001 until 2006.
Between 1983 and 2007, the agricultural sector in Thailand grew at a rate of 2.2% per year.
In 2007, a civilian government led by the Thaksin-allied People's Power Party (PPP) was elected in Thailand, marking a step towards restoring democracy after a period of political instability.
In 2008, the estimated number of non-national residents in Thailand was 2 million.
In April 2009, the 2008–2013 Cambodian–Thai border crisis brought troops on territory immediately adjacent to the 900-year-old ruins of Cambodia's Preah Vihear Hindu temple near the border. This crisis first began in 2008.
In April 2009, the 2008–2013 Cambodian–Thai border crisis brought troops on territory immediately adjacent to the 900-year-old ruins of Cambodia's Preah Vihear Hindu temple near the border.
As of 2009, the total number of non-national residents in Thailand was around 3.5 million.
Between 1932 and 2009, "Uniformed or ex-military men have led Thailand for 55 of the 83 years".
In 2009, another protest led by the People's Alliance for Democracy (PAD) ended with the dissolution of the People's Power Party (PPP), resulting in the Democrat Party leading a coalition government in Thailand.
In 2009, total national expenditures on health amounted to 4.3 per cent of GDP in Thailand.
As of 2010, Thai people make up the majority of Thailand's population (95.9%).
As of 2010, about 44.2% of Thailand's population lived in urban areas.
During 2010-2012, over 90% of medical tourists who travelled to Thailand did so for Sex Reassignment Surgery.
In 2010, a protest by the pro-Thaksin United Front for Democracy Against Dictatorship (UDD) ended with a violent military crackdown in Thailand, causing more than 70 civilian deaths.
According to the Royal Thai Government's 2011 Country Report, 62 ethnic communities are officially recognised in Thailand.
Between 2011 and 2016, Thailand's journal publications increased by 20%.
In 2011, the Pheu Thai Party won a majority in the general election in Thailand, leading to Yingluck Shinawatra, Thaksin's younger sister, becoming prime minister.
In 2011, the entertainment industries are estimated to have directly contributed $2.1 billion in GDP to the Thai economy.
The 2011 Thailand Country Report provides population numbers for mountain peoples and ethnic communities in the Northeast, relying on the Mahidol University Ethnolinguistic Maps of Thailand data.
The Chang Thailand Slammers won the 2011 ASEAN Basketball League Championship.
A 2012 study found that 64% of informal workers had not completed education beyond primary school.
As of 2012, Thailand had 103 airports with 63 paved runways, in addition to 6 heliports.
As of 2012, Thailand was the second-largest consumer of pick-up trucks in the world, after the US, due to its favorable taxation.
As of 2012, the Thai automotive industry was the largest in Southeast Asia and the 9th largest in the world, with an annual output of near 1.5 million vehicles.
During 2010-2012, over 90% of medical tourists who travelled to Thailand did so for Sex Reassignment Surgery.
In 2012, the number of international degree students in Thailand increased to 20,309 students.
In 2017, the Thai economy grew an inflation-adjusted 3.9%, marking its fastest expansion since 2012.
During the 2013-2014 Thai political crisis, a survey found that most anti-government PDRC supporters (32%) had a monthly income of more than ฿50,000.
In 2013, Thailand was the most visited country in Southeast Asia, according to the World Tourism Organization.
In 2013, the Ministry of Information and Communication Technology announced that 27,231 schools would receive classroom-level access to high-speed internet.
In April 2009, the 2008–2013 Cambodian–Thai border crisis brought troops on territory immediately adjacent to the 900-year-old ruins of Cambodia's Preah Vihear Hindu temple near the border. This crisis ended in 2013.
On 11 February 2014, the Lumpinee Boxing Stadium was relocated to Ram Intra Road.
After the coup d'état in 2014, Thailand had the highest number of lèse-majesté prisoners in the nation's history.
During the 2013-2014 Thai political crisis, a survey found that most pro-government UDD supporters (27%) had a monthly income between ฿10,000 and ฿20,000.
In 2014, 75% of Thailand's electrical generation was powered by natural gas.
In 2014, Credit Suisse reported that Thailand was the world's third most unequal country, with the top 10% richest holding 79% of the country's assets.
In 2014, a coup d'état occurred in Thailand, following political crisis and anti-Shinawatra protests, which led to the dissolution of parliament and invalidation of a scheduled general election.
In the third quarter of 2014, Thailand's unemployment rate was 0.84%, as reported by the National Economic and Social Development Board (NESDB).
Most recently, between 2014 and 2019, the military junta self-titled as the National Council for Peace and Order ruled the country.
The 2014 coup d'état in Thailand, which led to the rise of the Royal Thai Armed Forces, set the stage for future political events, including the pro-democracy protests in 2020.
In September 2015, Thailand ranked 16th worldwide in the Military Strength Index based on the Credit Suisse report.
Thailand's youth literacy rate was 98.1% in 2015.
In October 2016, Vajiralongkorn (Rama X) became the King of Thailand.
Between 2011 and 2016, Thailand's journal publications increased by 20%.
In 2016, 5.81 million people in Thailand lived in poverty, or 11.6 million people (17.2% of the population) if "near poor" individuals are included.
In 2016, Bhumibol, the longest-reigning Thai king, died, and his son Vajiralongkorn ascended to the throne.
In 2016, Thai annual defense budget almost tripled from US$1.98 billion in 2005 to US$5.88 billion.
In 2016, Thailand was ranked 91 out of 180 countries in the global Environmental Performance Index (EPI).
In 2016, Thais had a median wealth of $1,469 per adult, and Thailand was ranked 87th in the Human Development Index.
In 2016, the Thai economy grew at an inflation-adjusted rate of 3.3%.
As of 2017, Thailand has over 462,133 roads and 37 million registered vehicles, 20 million of them motorbikes.
In 2017, Thailand's GDP reached US$1.236 trillion on a purchasing power parity basis, making it the second-largest economy in Southeast Asia.
In 2017, Thailand's economy experienced an inflation-adjusted growth of 3.9%, marking its fastest expansion since 2012.
In 2017, Thailand's latest and current constitution was established.
In 2017, the Thai heist thriller film Bad Genius was released.
In 2017, there were 14 million people in Thailand who applied for social welfare, requiring a yearly income of less than ฿100,000.
In December 2018, the interim parliament voted to legalise the use of cannabis for medical reasons, making Thailand the first Southeast Asian country to allow the use of medical cannabis.
According to the 2018 National Statistical Office data, 93.46% of the country's population self-identified as Buddhists.
As of 2018, there were over 80,647 registered taxis nationwide.
In 2018, Muslims constituted 5.37% and Christians represented 1.13% of Thailand's population.
In 2018, Thailand ranked as the world's fifth-largest medical tourism destination in spending, attracting over 2.5 million visitors.
In 2018, the government developed an Alternative Energy Development Plan 2018–2037 (AEDP 2018).
According to the National Research Council of Thailand, in 2019, the country devoted 1.1% of its GDP to research and development.
After the 2019 Thai general election, a nominally democratic government was established.
Between 2014 and 2019, the military junta self-titled as the National Council for Peace and Order ruled the country, however, in 2019, it came to an end.
In 2019, Thailand had a Forest Landscape Integrity Index mean score of 6.00/10, ranking it 88th globally out of 172 countries.
In 2019, Thailand received 39.8 million international tourists and earned 60.5 billion US dollars from international tourism.
Thailand ranks world's sixth, and Asia's first in the 2019 Global Health Security Index.
In a report issued in March 2020, Amnesty International charged that Thai military conscripts face institutionalised abuse systematically hushed up by military authorities.
As of 2020, Thailand was ranked 89th out of 100 countries globally for English proficiency.
In 2020, large pro-democracy protests occurred in Thailand, including demands to reform the monarchy.
In 2020, the Future Forward party was dissolved in Thailand.
In 2021, large pro-democracy protests continued in Thailand, including demands to reform the monarchy.
In 2022, Thailand's export of goods was worth roughly US$290 billion, while its import was worth roughly US$305 billion.
In 2022, Thailand's oil and gas production dropped by 19% and 17%, respectively.
In 2022, the average Thai household size was 3 people.
In May 2023, the reformist opposition, composed of the Move Forward Party (MFP) and the Pheu Thai Party, won the general election in Thailand.
On 22 August 2023, Srettha Thavisin of the Pheu Thai party became Thailand's new prime minister.
As of 2023, Thailand has an estimated population of 71.7 million.
During the Israel-Gaza war in 2023, the government of Thailand changed its position and announced that Thailand adopted a neutral stance in this conflict after initially condemning the attacks. 28 Thai nationals were killed in this conflict.
In 2023, there were parliamentary elections in Thailand that were won by the Move Forward Party.
In the first quarter of 2023, Thai household debts totaled 14.6 trillion baht or 89.2% of GDP, with an average debt per household of approximately 500,000 baht.
On August 7, 2024, Thailand's Constitutional Court banned the Move Forward Party and all of its leaders from politics for its proposal to reform the lèse-majesté law.
On 14 August 2024, Thavisin was dismissed from his prime ministerial role by the Constitutional Court for his "gross ethics violations".
As of 2024, Thailand faces challenges including low productivity, poor education, and slow economic growth, with projections of annual GDP growth below 2% without structural reforms.
In 2024, Thailand was ranked as the 75th most peaceful country in the world, according to the Global Peace Index.
In 2024, Thailand's status improved from "not free" to "partly free" on the Freedom in the World Report due to competitive parliamentary elections and the formation of a new governing coalition.
Thailand ranked 41st in the Global Innovation Index in 2024.
As of 2025, State Railway of Thailand had 4,507 km of meter gauge track.
The Alternative Energy Development Plan set a goal in 2018 to increase renewable energy to almost 30,000 MW by 2037.
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