This is a very sophisticated scenario using a lot of triggers and special features.
It's the story of a Crusade to find relics and convert nations for the Glory of Jesus.
A death of old King opens the dispute for the crown. There are two forces disputing the privilege to make a King: The Sulton’s House and The Windsor’s House. The Prince of the Sultons will have the Pope's blessing if he puts himself into a bloody crusade against the barbarians and also the recovering of old relics from the Holy Land.