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you're talkiung about rebel armies sieging the province right? Then yes all you need to do is send in a unit of men to put them down, they will not retreat or anything so it should be a simple matter.
 
To increase the chance of the event that ends the revolt to fire, don't mobilize the regiment of that province, make sure the province has a court of justice, make sure that all 4 groups have at least 10% power, have a good efficiency and lower taxes.

And there are most likely other things you can do.