Someone already suggested this a while back, but it was not possible because of 'too much work'. Namely a trait that would be given to a gouvernor of a certain city with historic details about that city.
Say a Koinon Hellenon general of mine enters Corinth he will get the trait 'Gouvernor of Corinth and the upper Peleponnesos' (or something like that

). The trait would give some historic info on Corinth, explain what its strategical advantages/unique units, etc... are.
Implementing a feature like this would require a lot of work, sure, but it does not need to be made for every single city, only the most interesting ones. Of course,
every city is interesting in EB. :wink: