I don't know if this is possible but I was thinking about the Roman Empire and how once it aquired new provinces, eventually all troops porduced from that province would fight in a similar manner.

I know this can already be done by implementing a lvl 1 or 2 Govt, however the 3s and 4s can only produce local troops (Generally speaking). However over a long period of time (20 years?) even these 3 and 4 govts would eventually adapt their troops to fight in the manner of their conquerors.

Now this can be done by destorying the current govt and replacing it, however I think it would be good if these 3s and 4s could naturally train troops in the manner of their conquerers after a certain time has passed. Is this possible with scripting? It would also give a good bonus for holding onto a province for a long period of time. The disadvantage of this is that it may reduce the importance of builings 1s and 2s. This is just an idea I had and wanted some opinions on it.