@ Red Alert.
The era naming is just a formality, instead of having era 1 2 3.
One other problem is I do not think there is many technologies for American civilizations to research, at least not when compared to the Old World. And then there is a problem of unit advancement.
I see what you mean. One thing that often bothers me is that many of the New World civs make quite a large leap in technology due to European contact, which is a little weird in-game. The reason I mention this is because I wonder if this problem and the one you mention cannot both be solved at once. For example:
Bronze Age: "Early Preclassic Period" (to c.400 BCE)
Iron Age: "Late Preclassic Period" (c.400 BCE to c.200 CE)
Classical Age: "Classic Period" (c.200 - 800 CE)
Dark Age: "Early Postclassic Period" (c.800 - 1200 CE)
Medieval Age: "Late Postclassic Period" (c.1200 - 1500 CE)
High Medieval Age: (~16th Century)
Renaissance: (~17th Century)
Age of Enlightenment (~18th Century)
Industrial Age (~19th Century)
The latter three eras still align roughly with their Old World counterparts. With this model, you would spend one less era on the Pre-Columbian and associated technologies, and have one era to transition more gradually to gunpowder technology and all that.
Although I have nearly finished my Olmec, Toltec, Aztec, Preclassical and Classical Maya units.
As for North Africa, I need help with the Mali region, although its not really North Africa. I do not believe they had writing until Islam. But maybe other North African civilizations had contact with the area in ancient times and wrote about it.
I'm afraid I don't really know anything about the Mali region; I focus more on the pre-Roman Berber and Roman civilizations. Regardless, if I think of any way I can help with the Mali I will do so. You might try Plotinus, though.
I am not collaborating with Steph's mod. I am really just making leaderheads for my personal mod and that I hope other people will find a use for.
It's not a collaborative work, Shiro is just planning to use the opportunity of changing the leader with each era that my expanded editor offers.
And I suggested using the base of the leaderheads to make a few additional graphics (using some different props) for advisors
Ok, thanks for correcting me.