[Norfleet]

Phantom unrest is usually caused by a magic site you cannot detect, particularly if no amount of patrolling can drive it below 5, or 10, or 15. Spies and events producing unrest will give you a message, so if you don't get one, it's not enemy spies or "random" events.

There are several ways to deal with this unrest:

1. Drop taxes, either to 80, 70, or 60, for a static unrest level or 5, 10, or 15, respectively. This will, barring any other complications, reduce unrest to this baseline level(cannot go lower) every turn.

2. Patrol the province with preferrably cheap units.

3. Pillage the province and kill everyone. 0 population = 0 unrest.