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The Suffering of the People is the Suffering of the Emperor.
Map of the great Khmer Empire during the reign of Emperor Jayavarman 7. There were no Siam or Thailand, Laos and Vietnam. Only one vast country, Cambodia.
Map of Southeast Asia in year B.E.1444 or 900C.E. or A.D.
(Or 1,111 years ago).
Courtesy Wikipedia