Answer
Phibun, an abbreviation of Phibunsongkhram, is the unofficial name given to Plaek Phibunsongkhram, a Thai military leader and politician. Phibunsongkhram served as Thailand's prime minister from 1938 to 1944 and again from 1948 to 1957. Known for his authoritarian rule and nationalist policies, he played a significant role in modernizing Thailand and shaping its political landscape during the mid-20th century.