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;
Deputy Prime Minister of Canada the Liberal leadership in 2006 that was triggered when Martin resigned. Aside from Chrétien, the only deputy prime minister to even become leader of their party (not counting Erik Nielsen and Herb Gray, who acted as leaders of their respective parties, but only on a temporary basis, and before their time as deputy prime minister) was Jean Charest, who took over as leader of the Progressive Conservative party following its defeat at the 1993 election, which saw party leader Kim Campbell defeated in her riding. However, the Progressive Conservatives would never form a government again, and Charest left the party