Hi

It was a Macedon spy in that post above. Must have been a '4eye' causing 20% unrest.

A few turns later I destroyed the Macedon faction.

Immediately I opened the settlement details for Thermon. To see what had happened to the enemy spy. The 20% of unrest was now flashing. It was the display telling me that the unrest would dissappear at turn end.

Strangely. When I changed the tax rate in Thermon, the settlement details updated itself immediately and the 20% unrest dissappeared. It was no longer flashing...it had just gone.