Boun Oum (also Prince Boun Oum or Prince Boun Oum Nachampassack) son of King Ratsadanay, was the heir to the defunct throne of Champassack. Titular leader of the royalist faction in Laos, he served as prime minister of the Kingdom of Laos in 1948 - 1949 and again in 1960 - 1961. He retired from politics to pursue business interests from his base in Pakxe and Champassack but continued to be a major power broker until his exile in 1975, the year the communists came to power.
