Thanks to new techs and civics, the Classical Age in this mod is way more realistic and fun. In vanilla it was just Early wars with chariots and axemen. In this mod, you can be a republic, monarchy, or a city state at 1000 BC. The first rebels happen from AI's over expanding and Humans sucking at Micromanagement. The first main religions are founded. It also lasts much longer. It took me 2 days to complete Ancient and Classical ages. Kudos to the developers for making the classical age MUCH more fun.