question about the engine

[Baltic Hunter]

I have a question:

In EB the map has got homeland and expansion territories for each faction, which is a nice and realistic thing. The only problem I have is, that as the game advances the player even isn't able to recruit own troops in former expansion territories, which are, let's say after 50 or 100 years, that much settled by own faction population, that it would justify own faction troops. Does the game engine of RTW and M2TW allow something like this or not?

Just wondered because if f.e. Rome conquers whole Italian peninsula they still would be able to recruit f.e. around 50 B.C. (game time) only Celtic troops in the northern area and Hoplites in the south of Italia.

Probably the game engine doesn't allow something more realistic, but I just wanted to ask anyway