Is there any possibility integrating Banate of Bosnia (with one small region) between Kingdom of Croatia and Kingdom of Serbia in next version. I will research for you. Bosnia, in that time, was a small Banate (ruler was ban Ivan Kotromanic from 1059. till 1082/85) under Hungarian patronate (they were vassals to Hungaria). I would love to see Bosnia, Croatia and Serbia together in some mod...
Map with a small Banate of Bosnia between Croatia and Serbia:
Spoiler Alert, click show to read:
Rebelling against Hungaria:
Spoiler Alert, click show to read: