Unrest - itself driven largely by the happiness of the population - is the main factor that decreases province loyalty, giving -0.08 territory provincial loyalty for every point of unrest. Territory Provincial Loyalty modifiers affect individual territories and are scaled to the territory's relative population in the province before being applied to the territory's province's loyalty, Local Provincial Loyalty modifiers are applied to provinces and affecting its loyalty directly, and Provincial Loyalty modifiers affect all owned provinces in the country. Province loyalty changes monthly depending on the sum of all province loyalty modifiers.
Disloyal provinces will refuse to follow orders from the capital and may eventually revolt in a rebellion or join a civil war - managing the loyalty of provinces is one of the most important aspects of running an empire. Every province has a province loyalty value, representing the local level of support for the central government and the willingness of the province to follow its orders.
