[Micah]

What age?

You shouldn't station troops in provinces, use PD instead.

Unrest will decrease after a while if the tax rate is less than 100, and the computer will set the tax rate to do so automatically unless you tell it otherwise, it just hurts your income for a time...if you really need the income you can patrol down the unrest, but that takes valuable time away from your army, when it could be expanding.