ancient civilisations and empires in history

let's list 'em.
off the top of my head, there's ancient greece (philosophy! sculpture! tragedy!), rome (gladiators), the byzantine empire/constantinople (mosaics, awesome architecture), ancient india (uh.. elephants?), ancient egypt (pyramids and papyrus!) .. ancient china (vases, funny hats and robes), feudal japan (ninjas)

am I missing any? add please.

>>40
By that time he didn't have enough men, even though they were superioer they could not fight their way across India, march through 500 miles of jungle and then face off armies which outnumberred them considerably more so than Darius at Gaugamela (by this time most of his army must have perished). Theoretically he could defeat the odd Indian state, then threaten and coerce the rest like he did when he was getting the Greeks to side with him. Except the Indians would not be as eager to give him half of their troops since he was some upstart from the other side of the world and they would probably attempt to assassinate him or plot to take his lands when he leaves India to see to the rest of his empire or something.