 Various Tai-Shan peoples, who came down with the Mongols, came to dominate the political landscapes of the two former empires.Whereas Burma would see a resurgence, the post-Mongol Khmer state was reduced to a mere shadow of her former self, never to regain her preeminence.Only in the former Khmer Empire, did the Thai/Lao ethnicity and Thai/Lao languages spread permanently at the expense of the Mon-Khmer speaking peoples, not unlike the Burman takeover of the Pyu realm four centuries earlier.