Luang Phibunsongkhram

Phibunsongkhram was a key military officer in the People's Party that staged a bloodless coup, ending absolute monarchy in Siam. This revolution established a constitutional monarchy and introduced Western-style parliamentary democracy, transforming Thai politics.

Phibunsongkhram succeeded Phraya Phahon as Prime Minister, consolidating his power. He initiated a period of nationalist and militaristic rule, promoting Thai cultural identity and modernizing the military, while aligning Thailand with Japan.

After Japan invaded Thailand, Phibunsongkhram signed a treaty of alliance with Japan, allowing Japanese forces to use Thai territory. He declared war on the Allies, leading to Thailand's occupation and post-war status as a defeated nation.

As Japan's defeat became imminent, Phibunsongkhram was forced to resign by the National Assembly. His pro-Japanese policies had made him unpopular, and the Free Thai Movement, led by Seni Pramoj, gained power, allowing Thailand to avoid severe Allied punishment.

Phibunsongkhram staged a coup, returning as Prime Minister with military backing. He restored his authoritarian rule, aligning Thailand with the United States during the Cold War and suppressing political opposition, including the Free Thai Movement.

Phibunsongkhram was overthrown in a bloodless coup led by his own military subordinate, Sarit Thanarat. Accused of corruption and electoral fraud, he fled into exile in Japan, ending his 20-year dominance of Thai politics.