Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding. Using a text editor, edit the "revolt" file in the "Db" directory in the game folder. Look for the abbreviation of the country you are playing in the game. Insert the line "revolt = no" below the "expiryDate" line. For example, with England look for the following lines.
ENG = ( date = (day = 1 month = january year = 1419) expiryDate = (year = 1820) minimum = (247 244 245 246 248 249 250) extra = () capital = 247 group = latin ai = "England.ai"
and change it to...
ENG = ( date = (day = 1 month = january year = 1419) expiryDate = (year = 1820) revolt = no minimum = (247 244 245 246 248 249 250) extra = () capital = 247 group = latin ai = "England.ai"