I knew a little of that, but didn’t think to check Wiki! My bad! Thanks! :o]
:') I got confused and had to do it. :") I got thinking about Angkor Borei, which was the earlier capital of the Kingdom of Funai; that ran along for over 1000 years. It's astounding how quickly that civ arrived/arose in the region, built a bunch of cities that were basically temple complexes, on swamps, with no bedrock, then faded out to abandonment and obscurity, or at least seemingly -- the Kingdom of Funan actually lasted over a thousand years, which in the Mediterranean basin spanned the time from the Peloponnesian War to the rise of Islam. Strange how Funan went into decline, weird coincidence.