Kingdom of Vientiane
The Kingdom of Vientiane was completely obliterated. Khorat Plateau was formally annexed by Siam. The Siamese divided the Lao lands into three administrative regions. In the north, the king of Luang Prabang and a small Siamese garrison controlled Luang Prabang, Sipsong Panna, and Sip Song Chau Tai. The central region was administered from Nong Khai. The southern regions were controlled from Champassak. Fearing Siam influence, Vietnam under the Nguyễn dynasty annexed Muang Phuan and the provinces of Khammoune and Savannakhet, where they fought with Siam during the Siamese–Vietnamese War (1831–1834).