Insurgencies
From Conflict of Nations Wiki
Overview
Insurgents are the result of rebellions within a nation. They act as a global threat and are listed as their own nation under the campaign's rankings.
How Insurgents Spawn
Cities and provinces are at risk of rebellion while their morale is below ~40%. Undefended cities and provinces are immediately captured the moment insurgents spawn on them. If you have units stationed in a city/province with an insurgent spawn, they will engage in combat. In that case, your units will benefit from the defensive garrison bonus.
Garrisons
Insurgents will gather over time, increasing in health points and stack number. They will begin to spread to surrounding provinces.