Plaek Phibunsongkhram

Plaek Phibunsongkhram, then a young army officer, supported the People's Party in the bloodless coup that ended absolute monarchy in Siam. This event launched his political career and aligned him with the new constitutional regime.

Phibunsongkhram became Prime Minister of Thailand after succeeding Phraya Phahonphonphayuhasena. He consolidated power as a military dictator, promoting ultranationalist policies and a cult of personality.

Phibunsongkhram issued a series of cultural mandates (ratthaniyom) to modernize and nationalize Thai society. These included changing the country's name from Siam to Thailand, promoting Western dress, and suppressing regional identities.

After Japan invaded Thailand on December 8, 1941, Phibunsongkhram signed a military alliance with Japan and declared war on the Allies. This decision led to Thailand's occupation by Japan and its use as a base for the Burma campaign.

Facing Allied pressure and domestic opposition, Phibunsongkhram resigned as Prime Minister in 1944. He was briefly imprisoned for war crimes but later acquitted, and went into exile in Japan and the United States before returning to Thailand.

Phibunsongkhram returned to Thailand and, with military support, became Prime Minister again in 1948. His second term saw alignment with the United States during the Cold War, suppression of communists, and economic development.