The Burmese, seeing the disorder accompanying the overthrow of Taksin, invaded Siam again in 1785. Rama allowed them to occupy both the north and the south, but the "Uparat", "vice-king", his brother, led the Siamese army into western Siam and crushed the Burmese forces in a battle near Kanchanaburi. This was the last major Burmese invasion of Siam, although as late as 1802 Burmese forces had to be driven out of Lanna. In 1792 the Siamese occupied Luang Prabang and brought most of Laos under indirect Siamese rule. Cambodia was also effectively ruled by Siam. By the time of his death in 1809 Rama I had created a Siamese overlordship dominating an area considerably larger than modern Thailand.