Prime Minister of Thailand Rajanubhab took over this role. In fact, the office most considered the precursor of that of the prime minister was the ancient office of "Samuha Nayok" (สมุหนายก), which was run by an "Akkhra Maha Senabodi" (อัครมหาเสนาบดี) or "chief minister in charge of civilian affairs". The first Prime Minister of Siam was Phraya Manopakorn Nititada, a judge. The title of the office was changed from "Prime Minister "of Siam"" to "Prime Minister "of Thailand"" in 1945 and then permanently with the renaming of Siam to Thailand in 1949. For most of its existence the office has been occupied by Army leaders;
Prime Minister of Vietnam the Central Military Commission and the Central Police Party Committee. The tenure of a prime minister is five years, and the term is renewable once. The current prime minister Nguyễn Xuân Phúc has served since 2016. In case of incapacity, a deputy prime minister assumes the office of acting prime minister until the prime minister resumes duty, or until the appointment of a new prime minister. The powers and prestige of the prime minister have varied through the years. Pham Van Dong, Vietnam's second prime minister, often lamented that in practice he had little power. Since the death of Pham