Angkor Dynasty Suryavarman I Expansion

Timeline

1. 1041–1044Roluos (Hariharalaya) · Siem ReapSuryavarman I strengthened control over Angkor's core hydraulic systems and local administration, weakening independent lords by building temples and appointing loyal governors, moving Chenla from a loose alliance toward a more centralized royal structure.
2. 1044–1048Lower Mekong and eastern frontier · Mekong River basinIn the 1040s Angkor armies pushed east, integrating areas east of Tonle Sap and the lower Mekong, engaging in multiple conflicts and negotiations with Cham and local forces, expanding Chenla control over rice plains and trade routes.
3. 1048–1050Angkor · Siem ReapBy around 1050, the empire built by Suryavarman I stretched west to northeastern Thailand and east to the lower Mekong, covering major rice regions and inland shipping networks; after his death Udayadityavarman II succeeded him, continuing the Angkor imperial process.