I am going to quote ur-Lord Tedric on how to stop the restless rebellion (you should do this before the rebellion starts, otherwise it is going to do nothing):
Oma Whether you're playing a 0turn (in the 'Play_Rome' folder) or, like all mine, playing 1turn (in the 'Play_Rome_One_Turn' folder); in the /data sub-folder, you will find a text file called:
'export_descr_character_traits' - I'm sure many of you are familiar with it. Make a back-up copy, then...
Open this with Notepad (or similar) and 'Find' (Ctrl-F) the following Trait Trigger:
;------------------------------------------
Trigger Caesar_Rebellion1
WhenToTest CharacterTurnEnd
Condition FactionType romans_brutii
and IsFactionLeader
and not Trait HouseCaesar = 1
and not Trait Dictator > 0
and I_NumberOfSettlements romans_brutii >= 85
and I_TurnNumber > 2
Affects Caesar_Rebellion 1 Chance 5
;------------------------------------------;
For interest, you will note that there is a 5% chance that this will trigger every turn after you gain 85
Settlements. To simply disable it - change/edit the number '85' to '
198' and the rebellion should no longer occur (Note: there are 199 Settlements, but you are not supposed to capture the Free People's (SW corner) or Gotland, the Rebels Home).
Because you are not changing the structure of the file, this will be .sav-compatible.