These are special natural sites that will often hamper development in numerous ways, until you fix the issue (if that’s even possible).
Impediments and Boons
The new campaign starts two centuries before the Empires campaign.
But that’s not all, as Athens and Sparta are vying for supremacy over the Hellenes world, and soon the Aechemenid Empire and the western nations will be on a collision course. Don’t expect to play Persia as you would play Athens or Lydia, this is simply not possible! Initially, as Cyrus the Great, you’ll have to overthrow powerful neighbors, like Media, your former liege, Ancient Babylon and its mighty cities, or Lydia, ruled by Croesus, a man rich beyond dreams.