Brandenburg can get a personal union over Prussia if Prussia is a vassal of Brandenburg.This event is quite rare (MTTH is 500 months). Any Christian country can get an event that can lead to a peaceful union with another Christian nation if both rulers are between 16 and 40 and the two nations involved neighbor each other, have a high enough opinion of each other, have no heirs, both rulers are of a different sex and are either of the same dynasty or in the same culture group.France can receive an event that allows it to form a Personal Union with Naples.This enables Castile to later Form the Spanish Nation Diplomatically. This will also make Castile the senior partner in a Personal Union over Naples, if they are in a Personal Union under Aragon at the time that the event fires. Castile can form a Personal Union over Aragon through its Iberian Wedding event.This will result in Lithuania forming a Personal Union under Poland, and later enables the Polish decision to Form the Polish-Lithuanian Commonwealth. Poland can form a Personal Union over Lithuania through its Successor of Wladyslaw III event.if the player chooses Aragon, the Iberian Wedding event will not fire). All events resulting in a Personal Union can only fire if the junior partner is AI controlled (e.g. Several countries in this game have the opportunity to form a Personal Union with another country through an event. There are several way in which a player can form a personal union, or fall subject to one. Provence starts with a Personal Union over Lorraine.Burgundy starts with a Personal Union over Brabant, Holland and Flanders.Aragon starts with a Personal Union over Naples.Denmark starts with a Personal Union over Sweden and Norway.2.2 Personal union through diplomatic meansĬountries starting with a personal union in 1444.1 Countries starting with a personal union in 1444.