With the support of Krommeunchetsadabodin (later King Rama III), Anouvong persuaded King Rama II to appoint Anouvong's son, Prince Ratxabout, to the now vacant throne in Champasak.
He was assigned the task of conquering Laotian kingdoms in 1778 and all the three kingdoms (Vientiane, Luang Prabang, Champasak) fell to the Siamese in the same year.
During 1771 - 1781, Surasi joined his brother in massive campaigns subjugating the Laotian kingdoms of Vientiane, Luang Prabang, and Champasak, and Cambodia.
No Muong, king of the southern Laotian Kingdom of Champasak in 1811
Prince Souphanouvong (July 13, 1909 — January 9, 1995) was, along with his half-brother Prince Souvanna Phouma and Prince Boun Oum of Champasak, one of the “Three Princes” who represented respectively the communist (pro-Vietnam), neutralist, and royalist political factions in Laos.
It is located at the base of mount Phu Kao, some 6 km from the Mekong river in Champasak province.