After the Kingdom of Siam, contemporary Thailand, extended control to Lao territories east of the Mekong in the 1770s, Muang Phuan became a Siamese vassal state and also maintained tributary relations with Dai Viet (Vietnam). To exert greater control of the lands and people of Muang Phuan, the Siamese launched three separate campaigns (1777–1779, 1834–1836, and 1875–1876) to resettle large parts of the Phuan population to the south in regions under firm Siamese control. Subsequent invasions by Haw marauders, splinter groups of ex-Taiping Revolution rebels from southern China plundered Luang Prabang and Xiangkhouang in the 1870s, and desecrated and destroyed the temples of the Phuan region.