The kingdom of Siam founded by the Chakri dynasty after Ayutthaya's fall; it modernized and maintained independence through the colonial era, becoming a constitutional monarchy in 1932.
Ended by the bloodless Siamese Revolution of 24 June 1932, when the Khana Ratsadon seized power and forced King Prajadhipok to grant a constitution, transforming the absolute monarchy into the constitutional Kingdom of Thailand.
The atlas holds 4 border frames for Rattanakosin Kingdom — the shape you scrub through changes in 1782 · 1842 · 1907 · 1922.
The current standard one-volume regional history covering Funan, the Khmer Empire, Pagan, and the Thai kingdoms in their long context.
Lieberman's account of Siamese state-building runs to 1830, covering the Chakri/Rattanakosin foundation and the centralizing trajectory that let Siam survive the colonial era.