Prime Minister of Thailand sixteen out of twenty-nine, including the incumbent General Prayut Chan-o-cha. Military dominance began with the country's second Prime Minister, Phot Phahonyothin, who ousted his civilian predecessor in a coup in 1933. The longest serving Prime Minister was Field Marshal Plaek Pibulsonggram at 14 years, 11 months and 18 days. The shortest was Tawee Boonyaket at just 18 days. Nine were removed by coups d'état, three were disqualified by court order, and eleven resigned from office. The youngest ever to occupy office was M.R. Seni Pramoj at 40 years old. Thailand received its first female prime minister, Yingluck Shinawatra, in 2011.
Prime Minister of Cambodia to 1998. Elected as prime minister in his own right in 1998, he is the longest serving prime minister in Cambodian history. The position was first held by King Norodom Sihanouk in March 1945, during the French colonial administration. Cambodia's first parliamentary elections were held on 1 September 1946. The Democratic Party remained the dominant-party in Cambodian politics throughout the 1940s until the formation of the Sangkum Reastr Niyum in 1955. Sangkum was the dominant-party in Cambodia from 1955 to 1970 following a military coup by General Lon Nol. Until 1993, it was not an elected position. Merely few prime