Would be great to have an -enable donating troops at the Kingdom level for AI vassals. It really sucks to win a castle I have no intentions of holding on to, but as the ruler it is mine until election so there is a grace period where no one will put troops into the garrison. You have to wait until the election is held and then go in with your army for vassals to donate. I understand that getting a full castle can bankrupt some early game player but i have plenty of money now that i run a kingdom and that isnt an issue, but having an empty castle is a huge issue as i have to wait at it until election time or my AI armys just leave the fief with no garrison if im not there to keep them around which is a massive issue.Ok. We can add several options for your parties. This can solve problem.
-enable other hostile actions (attacking villagers / caravans)
-enable donating troops