There is an interesting concept in the Iberian Peninsula during the Middle Ages, the concept of a crown, a "fusion" of various kingdoms into a new one.
Examples:
Castilla's crown
en.m.wikipedia.org
Aragon crown
en.m.wikipedia.org
This is well reflected in the decision to unite the Spanish thrones.*
*Please change that name. Spain did not exist until the sixteenth century. Besides, Spain represents the union of the crown of Castile and the crown of Aragon, representing all the inhabitants, not only those of Castile.
Suggestion: Unite the Christian thrones of the Iberian northwest
In the game there should be several decisions that could simulate (if the conditions are met) certain historical moments and be able to connect the game from 867 to 1066
I would make the following decisions:
1-Create the kingdom of Leon Who can do it: Kingdom of Asturias Conditions: Exactly the same as the ck2
2-Unite the Christian thrones
Northwest:
Who can do it:
Any kingdom that
come from the kingdom of
Lion
Conditions: The kingdom of
Leon must have
party in several kingdoms
The victorious kingdom has
to retrieve all
kingdoms and the dynasty that has cattle must be
several years in possession of
all titles.
Results:
A) The kingdom of León recovers its borders, the kingdom continues to be called the same.
B) Castile conquers all the kingdoms, the crown of Castile is created
C) Galicia conquers all the kingdoms, the crown of Galicia-Leon is created (alternative version)
3- Create the crown of Aragon.
Conditions: Have the Kingdom of Aragon, Valencia and the Duchy of Barcelona and that the same dynasty has ruled x years
4- Some decision to represent the supremacy of the county of Barcelona within the Catalan counties.
en.m.wikipedia.org
5-Some decision related to the kingdom of Navarra and the kingdom of Pamplona (something similar to the kingdom of Asturias and the kingdom of León)
en.m.wikipedia.org