For example:
The Union of Soviet Socialist Republics (USSR) dissolved in 1990, and was replaced by the Russian Federation.
This could be quickly acquired from age tech level up or technology level up that is requiring a certain age tech researched by the player.
We could also make an alternative reality where the USSR didn't collapse and the faction's name and image won't change
Although, keeping the faction name and image is not that important, as their use is more on alternative history maps and campaigns.
I think that this could also benefit Age of Discovery(AoD) as well, since they span a large timeline(1500s-1900)(?)
The issue is, how could this be managed in map editor and random map start-ups?