Sukhothai–Uthong System, Precursor to Ayutthaya

Timeline

1. c. 1238–1298Sukhothai · ThailandSukhothai became independent from the Angkor tributary system, forming a Siamese political network centered on the capital with surrounding city-states as vassals, reaching its zenith during the reign of Ram Khamhaeng.
2. c. 1298–1340Central Siam (Sukhothai–Lopburi) · ThailandIn the 1310s Sukhothai royal power declined, and aristocrats such as those of Uthong accumulated power around Lopburi, as the urban system of central Siam entered a transitional phase toward migration to Ayutthaya.
3. c. 1351Ayutthaya · ThailandUthong built the new capital of Ayutthaya at the bend of the Chao Phraya River, and the Sukhothai–Uthong system's function as an independent political center thereby gave way to the Ayutthaya kingdom.