Historical figure

Khmer Krom nationalist, co-founder of Nagara Vatta and prime minister of Cambodia in 1945 and 1972.

A dark wooden desk holding blank paper, a fountain pen, a brass inkstand and a black desk telephone, with a rattan chair, a ceiling fan and open wooden shutters looking onto palm trees and a pale yellow colonial building
Illustration inspired by a government office in Phnom Penh in the 1940s

Son Ngoc Thanh (1908 to 1977) was a Khmer Krom (ខ្មែរក្រោម) nationalist who co-founded the paper Nagara Vatta and led Cambodia's government in 1945 and 1972.[1][2]

He spent most of his later life opposing Norodom Sihanouk (នរោត្តម សីហនុ), at the head of the Khmer Serei, and he died in detention in Vietnam in 1977.[1]

Early life and career

He was born in 1908 in Trà Vinh, in French Cochinchina, in what is today the Mekong Delta of Vietnam, and he belonged to the Khmer Krom minority.[1] He read law in Saigon, Montpellier and Paris and then came back to Indochina. Under the colonial administration of the French protectorate of Cambodia he served as a magistrate in Pursat (ពោធិ៍សាត់) and as deputy public prosecutor in Phnom Penh. He later became deputy director of the Buddhist Institute (វិទ្យាស្ថានពុទ្ធសាសនបណ្ឌិត្យ).[1]

Nagara Vatta

In 1936 he and another Khmer Krom, Pach Chhoeun, started Nagara Vatta (Angkor Wat).[2][1] Accounts of its place in the Khmer press differ. Two sources have it as the first Khmer-language newspaper.[2][1] In another, it was the first paper in Khmer to take up politics and sensitive issues, after the Khmer-language magazines Kampu Sorya (1926) and Srok Khmer. That account makes Pach Chhoeun its publisher and places Son Ngoc Thanh among its founders and writers, with Sim Var.[3]

The paper's editorials mildly criticized French colonial policy and rural usury,[2] and it took a nationalist line, urging Khmers to break the hold of foreign traders on commerce.[1] In the historian Ben Kiernan's view, that line left Son Ngoc Thanh and his colleagues open to Japanese "national socialism".[1]

Japan and 1945

In July 1942 the French authorities arrested and defrocked the monk Hem Chieu, and the editors of Nagara Vatta led a demonstration calling for his release. The Vichy authorities arrested the marchers and sentenced Pach Chhoeun to life.[2] Son Ngoc Thanh got out of Phnom Penh and went to Japan.[2][1] The French closed the paper in 1942.[4]

The sources differ on his time in Japan. The Library of Congress study places him in Tokyo the year after his escape and has him come back in May 1945.[2] Cambodge Mag has him spend three years in Japan, with political training at the Greater East Asia School in Tokyo, and come back in March 1945.[1]

He first became foreign minister.[2][1] The sources differ on how he took the head of the government. In the Library of Congress study, a new government was formed on August 15, 1945, the day Japan surrendered, with him as acting prime minister.[2] Cambodge Mag has him proclaim himself prime minister on Japan's surrender, and his government lasted barely two months.[1]

When the French came back in October 1945, he was arrested and sent into exile.[1] The Library of Congress study has an Allied force take Phnom Penh and hold him for working with the Japanese, then send him to France under house arrest.[2] Cambodge Mag has him exiled to Saigon first and then to France.[1] Many of his followers joined the Khmer Issarak resistance, some of them in the northwest of the country, which Thailand then held.[2][1]

Return and the Khmer Serei

Sihanouk asked the French to free him from exile and let him come home.[4] He reached Phnom Penh to a warm welcome on October 29, 1951.[4][1] He turned down a cabinet post and sided with several Issarak leaders.[1] He soon called for French troops to leave Cambodia, and in early 1952 he pressed the demand again in his own weekly, Khmer Krok (Khmer Awake!).[4] The weekly was stopped in March 1952.[4][1] He then left the capital with a few armed men to join the Khmer Issarak.[4] He and his lieutenant Ea Sichau moved into the forest country near Siem Reap (សៀមរាប) to raise an armed resistance of his own.[1]

He tried to gather the Khmer National Liberation Committee around himself. From 1954 the American Central Intelligence Agency (CIA) approached him, and by one account it paid for much of his work in the decades that followed.[1] Sihanouk called him a communist at some times and a CIA agent at others.[4]

From a base near Siem Reap he formed the Khmer Serei (Free Khmers), a force drawn mostly from the Khmer Krom, whose aim was to bring down Sihanouk.[1][4] A 1959 manifesto of his charged that Sihanouk was letting North Vietnam bring communism into Cambodia by stealth. The Khmer Serei fought mainly by radio, with secret broadcasts against Sihanouk, and its name came up as a possible force in plots against him, among them the Bangkok Plot.[1] He stayed in exile until Lon Nol (លន់ នល់) set up the Khmer Republic (សាធារណរដ្ឋខ្មែរ) in 1970.[4]

Khmer Republic

After the army and Lon Nol removed Sihanouk in 1970, he was asked to join the new government. He first served as adviser to Cheng Heng, then acting head of state, and he placed the Khmer Serei forces under the new government. In March 1972 he became prime minister a second time, after Sisowath Sirik Matak.[1] He was the target of a bomb attack, which several sources blame on Lon Non, Lon Nol's brother.[1] Lon Nol dismissed him by October 1972, and he went into exile in South Vietnam.[1]

Death

After Saigon fell in April 1975, Viet Cong forces arrested him. He died of illness in detention at Chi Hoa Prison in Ho Chi Minh City on August 8, 1977.[1]

Legacy

To some Khmer Krom and to part of the anti-communist diaspora, he stands for unbending national resistance.[1] His disputed role is the subject of work by Ben Kiernan and of Matthew Jagel's 2023 book Khmer Nationalist: Sơn Ngọc Thành, the CIA, and the Transformation of Cambodia.[1]

References 4


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This page was last edited on 13 November 2026, at 23:30.