Prince Souphanouvong (July 13, 1909 ??January 9, 1995), along with his half-brother Prince Souvanna Phouma (October 7, 1901 ??January 10, 1984) and Prince Boun Oum of Champasak (December 12, 1912 - March 17, 1980), were known as the 'Three Princes'. Each represented respectively the communist (pro-Vietnam), neutralist, and royalist political factions in Laos in the 1950s and 60s.