Well done. That's quite a few empires.

I recall an early empire in India (I think it was India but I'm not quite certain), that one of my history professors discussed. Keep in mind I'm an Accountancy major. This one predated many empires apparently. I do remember the professor saying that archeologists found it astonishing that cities with this sort of structure were found so early in history. It suggested the use of irrigation. In any case, I can't remember the date of this empire nor the location so this is of no use I guess. I do know that it predated many of the typical empires that people know of and it was relatively short lived. Or I could just be completely wrong