Plaek Phibunsongkhram

Plaek Phibunsongkhram (14 July 1897 – 11 June 1964), commonly known in English language sources as Phibun and as Chomphon Por in Thai, was a Thai military officer and politician who served as the third prime minister of Thailand from 1938 to 1944 and again from 1948 to 1957. He rose to power as a leading member of the Khana Ratsadon, becoming prime minister in 1938 and later consolidating his influence as a military dictator. His regime allied with the Empire of Japan during World War II, and his administration was marked by authoritarian policies and the promotion of Thai nationalism. He was closely involved in both domestic reforms and foreign policy during the war and played a central role in shaping modern Thai state ideology. Phibun's ideology has been described as fascist.

Born in Nonthaburi, Phibun graduated from the Royal Military Academy in 1914 before continuing his studies in France. After returning to Siam, he became involved in the Khana Ratsadon, a group that led the 1932 Siamese Revolution, which replaced the country's absolute monarchy with a constitutional monarchy. Phibun emerged as a prominent military figure following the revolution, gradually consolidating power within the armed forces.

In 1938, Phibun became prime minister while serving as Commander of the Royal Siamese Army. Inspired by the Italian leader Benito Mussolini, his government established an authoritarian regime run along fascist lines, and launched a series of cultural mandates aimed at modernizing Thai society. These policies included changing the country's name from "Siam" to "Thailand", promoting Western-style dress, emphasizing the Thai language, and encouraging Thai nationalism and Sinophobia. During World War II, Phibun aligned Thailand with Imperial Japan, allowing Japanese forces to pass through Thai territory and later declaring war on the Allies. This alliance was controversial and led to internal resistance, most notably the Free Thai Movement and Regent Pridi Banomyong, a former associate within the Khana Ratsadon. As the war progressed and Japan's position weakened, Phibun lost political support and was forced to resign by the National Assembly in 1944. Following the war, he faced accusations of war crimes, though he was later acquitted.