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 the West Indies Federation Prime Minister of the West Indies Federation This is a list of the Prime Ministers of the West Indies Federation (also known as the British Caribbean Federation), consisting of ten provinces: Antigua (with Barbuda), Barbados, Dominica, Grenada, Jamaica (with the Cayman Islands and the Turks & Caicos Islands), Montserrat, St. Christopher-Nevis-Anguilla, St. Lucia, St. Vincent, and Trinidad and Tobago. The Federation was formed on 3 January 1958, and was formally dissolved on 31 May 1962. The Prime Minister was elected by the House of Representatives from among its members, constitutionally acted as an advisor to the Governor-General of the West