I have Parker liberated and everything in it completed. I also drove through it for quite some time after that (only in the north part/can't figure out how to get to the south (?)) but no new events came up. It's currently at 84 % morale level (public support). How can I raise this number?
I didn't think it was possible, but it piqued my interest so I had a rummage:
The only lead I can find on raising morale in liberated sectors is destroying (now empty) EDF buildings. Apparently is awards morale instead of reducing EDF control, post-liberation.