During the time of the Khmer emperors, it ruled the entire Mekong River valley but fell under the sway of its stronger neighbors after the 5th century.
在高棉王朝时代，它统治了整个湄公河流域，但在5世纪之后，在它的强大邻邦的影响下衰落了。
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During the time of the Khmer emperors, it ruled the entire Mekong River valley but fell under the sway of its stronger neighbors after the 15th century.