Unlike Ssitherai, the Khmer Nagas are what is left of the Naga Empire.  These Nagas fled East, escaping the invading might of the Hellenic Armies. While their original empire was destroyed, they did find lands far to the East that were controlled by a group of humans that interbred with snakes on their own.

Called the Yuan-ti Lands, the Naga attacked this kingdom and took it over.  The Yuan-ti did their own breeding with snakes, and so the Naga don't have to.  To govern more effectively, the Naga are hidden behind the scenes, governing from behind the scenes.  Just incase their enemy, humans (they were attacked by humans and their Empire was destroyed by humans) comes against them again. 

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