Peter II (1923–1970) 29 November 1943 - Josip Broz Tito (1892–1980) Zaire 1983 - Mobutu Sese Seko (1930–1997) Other countries The rank also exists or has existed (on paper at least) in Bangladesh, Brunei, South Korea, Nigeria, Oman, and South Vietnam, but not all of these countries have used it. Footnotes