I'm playing England in the 1066 scenario and after having dealt with the rebellion of Northumberland all my other vassals are declaring independence from me.
In Northumberland's case I took all the lands from the Duke in anticipation of creating the Duchy of York (plus it might be a good idea to keep the countdoms of lands right next to the Scottish border, I think), with the others I'm re-vassalising them, which is probably a bad idea but I hear taking land off them results in bad reputation and further rebellions.
What does a King do?
In Northumberland's case I took all the lands from the Duke in anticipation of creating the Duchy of York (plus it might be a good idea to keep the countdoms of lands right next to the Scottish border, I think), with the others I'm re-vassalising them, which is probably a bad idea but I hear taking land off them results in bad reputation and further rebellions.
What does a King do?