The only regional units I have found were mercenaries. No more regional unit production Which is really a shame as at this time period there was not so much national characters the way we think of it today. IMHO all units should be regional rather than national and Nations should be able to learn buildings as they expand.

If you asked people from that eria what they wore they would tell you something like I am a Yorkshire man or Florentine, Frisian or what ever. Not that I am an Englishman or German or Italian. Nationalism seemed to start in England but it was a long time catching one elsewhere.