possible to sack but not occupy the settlement?

[Lonck]

In RTW:BI horde units have the option of leaving a settlement after attack. I want to make a new option or modify 'sack' option to sack the settlement after the garrison has been killed but not occupy it so that the settlement stays under the control of either the previous owner or becomes rebel with no units inside. Is that possible? prolly a campaign script? I want it to be only available to the human player if possible.

[Snipafist]

I believe the Mongols and Timurids have this ability due to being hordes, but it's barred to regular factions.

[alpaca]

Well we can't provoke rebellion via scripting so it's not really possible I believe.