Since it has been written that after the DM (Dominion War), Cardassai was in ruins, that the Marines were sent in as Occupation forces to keep the peace. So were there any acts of civil disobedience where the Marines had to put down riots, to keep the peace?
a society as authoritarian as Cardassia, would seem to avoid that and just get on with things while rebuilding. I haven't read the books that take place after, so I have no idea what's in the novel verse.
We know there was a dissident movement on Cardassia, who probably weren't entirely eradicated by the Dominion. When Cardassia was in ruins they probably became more active.