The Historical unit models designed for this game in the Modern era are amazing, both for design and authenticity. These models only show for the Prussian, Russian or other civilizations determined.
What would be better instead:
Fascist ideology Civs = German Wehrmacht unit models
Communist ideology Civs = Russian Red Army unit models
Democracy ideology Civs = American/British Army unit models
Not only will it make it easier to distinguish fast on UI what ideology your opponents/allies chose, but it also makes Historical sense and a great immersive detail to add for the Modern age.