I did have an idea that might fit though, since the bronze age does not seem possible.

What if: During the 1300's, the Black Death ravaged Europe. Spreading across the continent, the plague took no prisoners as it slaughtered farmers, artisans and royalty. Finally, after over 10 years of destruction, the plague seems to have finally dissipated. What peasants find however is their nations ruined, the populations decimated, and their rulers either dead or exiled. Through the ashes of destruction, new nations are to be born, ruled by daring men and women.

We could do something like this. That way, new nations can emerge, some even based off of old ruling kingdoms, etc. We could even retcon it further, making the plague last even longer and killing even more people then historically. The game would have a slight apocalyptic edge to it and allow player creation.