I was hoping someone could help me out with understanding the regional governance of Castile in the middle ages. According to Wikipedia, the country was divided into sub-kingdoms of Leon, Castile, Toledo, Jaen, Seville etc. However, elsewhere I keep coming across references to fueros and municipalities of Extremadura (part of the Leonese kingdom) and Andalusia (which crossed three kingdoms*). I'm most interested in the 1200-1400 period.
In addition to understanding how the governance system worked, any insight into the strengths of regional identity would be interesting. I'm curious about which nobilities/local administrators would be most likely to revolt to set up their own state if the King's position got weakened.
*Granada only became considered part of Andalusia in the 18th century.