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| Communist insurgency in Thailand | |||||||
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| Part of theCold War andIndochina Wars | |||||||
A zinc bowl engraved with Thai message reading "Obliterate all the communists – out of the soil of Thailand" – a propaganda tool against communist insurgency in Thailand, discovered inWanon Niwat district,Sakon Nakhon province | |||||||
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| Belligerents | |||||||
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| Commanders and leaders | |||||||
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| Strength | |||||||
| Royal Thai Armed Forces: 127,700 Royal Thai Police: 45,800[6] | 1,000–12,000 rebels 5,000–8,000 sympathizers[7][13] | ||||||
| Casualties and losses | |||||||
| 1966:[14] ~90 soldiers and police killed 1967:[15] 33 soldiers and police killed 1969–1971:[13][14] 1,450+ soldiers, police, and officials killed 100+ wounded 1972:[15] 418 soldiers and police killed | 1966:[13] 133 insurgents killed and 49 captured[16] 1967:[15] 93 insurgents killed unknown captured 1969–1971:[13][14] 365+ insurgents killed 30+ wounded 49+ captured 1972:[15] 1,172 insurgents killed[15] 1982:[15] Unknown killed 3,000+ insurgents surrendered | ||||||
| Unknown civilian deaths (3,008 killed by government forces alone in 1971–1973)[17] | |||||||
Thecommunist insurgency in Thailand also known asThe people's war from theleftists perspective was aguerrilla war lasting from 1965 until 1983, fought mainly between theCommunist Party of Thailand (CPT) and thegovernment of Thailand. The war began to wind down in 1980 following the declaration of an amnesty, and in 1983, the CPT abandoned the insurgency entirely, ending the conflict.

In 1927, Chinese communist Han Minghuang attempted to create a communist organization in Bangkok before being arrested.[14]Ho Chi Minh visited northern Thailand the following year, attempting to organizesoviets in local Vietnamese communities.[14] In the aftermath of theSiamese revolution of 1932, conservative Prime MinisterPhraya Manopakorn Nitithada accused his political opponentPridi Banomyong of being a communist, with his government passing the Anti-communist act of 1933, which criminalized communism.[14]
DuringWorld War II, communists formed an alliance with theFree Thai Movement. In 1946, Pridi Banomyong assumed office, repealing the Anti-communist act and establishing diplomatic relations with theSoviet Union.[14]
In 1949, Banomyong'sattempt to return to power after the1947 Thai coup d'état was crushed. The suppression of the "palace rebellion" convinced the CPT leadership that better preparations had to be made in order for a future rebellion to succeed.[18]
The failure of the 1952 Peace Rebellion was followed by the 13 November 1952 Anti-communist act, sparked by the spontaneous involvement of a small number of communist party members in the rebellion.[18]
During the course of theKorean War, the CPT continued to stockpile weaponry in rural areas and make general preparations for armed struggle. At the same time, the CPT formed the Peace Committee of Thailand, apacifist movement operating mainly in urban areas. The Peace Committee contributed to CPT's expansion and the rise ofanti-American sentiment in the country.[18]
In 1960,North Vietnam created a training camp for Thai and Laotian volunteers inHòa Bình, Vietnam. A total of 400 people attended the camp in its first year of operation.[14]
Ideologically, the CPT aligned withMaoism and during theSino-Soviet split the party sided with theChinese Communist Party. In October 1964, the organization declared its position in a congratulatory message on the occasion of the 15th anniversary of the foundation of the People's Republic of China,[7] and the following month a group of Thai communists formed the Thailand Independence Movement inPeking, China.[14]
On 8 December 1964, the Thailand Independence Movement issued a manifesto demanding the removal of US military personnel from Thailand and calling for regime change. The manifesto was later also broadcast by Radio Peking.[14] Former Thai army officer Phayon Chulanont established the Thai Patriotic Front, another Thai communist organization, on 1 January 1965.[14] The two parties formed theThai United Patriotic Front on 15 December 1966.Hill tribesmen, as well as members of the Chinese and Vietnamese ethnic minorities, formed the backbone of the movement.[14]
In the early 1950s, a group of 50 Thai communists traveled toBeijing, where they received training in ideology and propaganda. In 1961, small groups ofPathet Lao insurgents infiltrated north Thailand. Local communist party cells were organized and volunteers were sent to Chinese, Laotian and North Vietnamese training camps, where training focused on armed struggle and terror tactics to fight capitalism in the region. Between 1962 and 1965, 350 Thai nationals underwent an eight-month training course in North Vietnam. The guerrillas initially possessed only a limited number offlintlocks as well as French, Chinese and Japanese weapons. In the first half of 1965, the rebels smuggled approximately 3,000 US-made weapons and 90,000 rounds of ammunition from Laos. The shipment, originally supplied to the US-supportedRoyal Lao Armed Forces, was instead sold to smugglers who in turn traded the weapons to the CPT.[6][13]
Between 1961 and 1965, insurgents carried out 17 political assassinations. They avoided full scale guerrilla warfare until the summer of 1965, when militants began engaging Thai security forces. A total of 13 clashes were recorded during that period.[6] The second half of 1965 was marked by a further 25 violent incidents,[6] and starting in November 1965, CPT insurgents began undertaking more elaborate operations, including an ambush on a Thai police patrol outsideMukdahan, at that time inNakhon Phanom Province.[14]
The insurgency spread to other parts of Thailand in 1966, although 90 percent of insurgency-related incidents occurred in the northeast of the country.[6] On 14 January 1966, a spokesman representing the Thai Patriotic Front called for the start of a "people's war" in Thailand. The statement marked an escalation of violence in the conflict, and in early April 1966 rebels killed 16 Thai soldiers and wounded 13 others during clashes inChiang Rai Province.[14] A total of 45 security personnel and 65 civilians were killed by insurgent attacks during the first half of 1966.[14]
Despite five insurgent attacks on the bases used by theUnited States Air Force in Thailand, American involvement in the conflict remained limited.[6][19]
Following the defeat of theNational Revolutionary Army in theChinese Civil War, its 49th Division crossed into Thailand from neighboringYunnan. The Chinese troops began engaging in theopium trade with the tacit approval of the government, with officers being involved in the trafficking of opium produced by tribal groups in Yunnan, Burma, Laos, and Thailand, collecting "protection fees" in their various areas of influence, in exchange for the safety of trafficked goods from other armed organisations. The trade provided a source of income for the local population, with the Thai government not following its obligations to eliminate the trade, fearing economic catastrophe in the north if it was ended with no alternative source of income. At the same time, nationalist troops cooperated with the government during its counter-insurgency operations. In July 1967, the1967 Opium War broke out when warlordKhun Sa refused to pay the informal "taxes" whichKuomintang officers operating in Thailand levied on opium caravans. Government forces became involved in the conflict, destroying a number of villages and resettling suspected communists, providing new recruits for the CPT.[20]
In February and August 1967, the Thai government conducted a number of counter-insurgency raids inBangkok andThonburi, arresting 30 CPT members including secretary-general Thong Chaemsri.[14] Further arrests ensued in October and November 1968.[14]
From 1972 to 1974, theRoyal Thai Marine Corps andRoyal Thai Air Force participated in anti-communist operations in the Chiang Rai province. TheAU-23A Peacemaker was primarily used during the operation. Flying Unit 2232, Task Force 170, and Task Force 172 were tasked with these operations and were based atChiang Kham Airport.[21]
The Royal Thai Armed Forces, Royal Thai Air Force, and Royal Thai Marine Corps collaborated on a joint-military operation which begun on 3 July 1972. They participated in anti-communist insurgent operations in the provinces of Phetchabun, Phitsanulok, and Loei.[22] This operation was also the first time the RTMC collaborated with the RTA and the RTAF during a mission. The operation ended in 29 January 1973, resulting in a successful disruption in insurgent activities.[23]
The Thai government deployed over 12,000 troops to the country's northern provinces in January 1972, carrying out a six-week operation in which over 200 militants were killed. The government's casualties during the operation amounted to 30 soldiers killed and 100 wounded.[14]

In late 1972, the Royal Thai Army, police, andvolunteer defence forces committed theRed Drum killings of more than 200[17] (unofficial accounts speak of up to 3,000)[24][25] civilians who were accused of supporting communists in Tambon Lam Sai,Phatthalung Province, southern Thailand. The massacre was probably ordered by the government'sCommunist Suppression Operations Command (CSOC).[17][26]
It was only one example "of a pattern of widespread abuse of power by the army and enforcement agencies"[27] during the brutal anti-communist operations of 1971–1973 that took an official death toll of 3,008 civilians throughout the country[17] (while unofficial estimates are between 1,000 and 3,000 in Phatthalung Province alone).[25] Those killed were accused of working with the CPT. Until that point, communist suspects arrested by soldiers were normally shot by the roadside. The "red oil drum" technique was later introduced to eliminate any possible evidence. Suspects were clubbed to a point of semi-consciousness before being dumped in gasoline-filled, usedoil drums and burnt alive.[28][29] The 200 litre red drums had an iron grille divider with a fire below and the suspect above.[30]
On 6 October 1976, amid rising fears of a communist takeover similar to the one that had taken place in Vietnam, anti-communist police and paramilitaries attacked a leftist student demonstration atThammasat University in Bangkok, during an incident that became known as theThammasat University massacre. According to official estimates, 46 students were killed and 167 wounded.[31]
From 1979, amid the rise ofThai nationalism and the deterioration ofChina–Vietnam relations, the CPT fell into serious turmoil. The pro-Vietnamese wing had eventually seceded and formed a separated faction calledPak Mai.[7]
Efforts to end the insurgency led to an amnesty being declared on 23 April 1980 when Prime MinisterPrem Tinsulanonda signedOrder 66/2523. The order significantly contributed to the decline of the insurgency, as it granted amnesty to defectors and promoted political participation and democratic processes. By 1983, the insurgency had come to an end.[32]