Avoiding Realm Divide?

[Maltz]

I'm pretty sure I've still has post RD vassals turn on me though?! Was this due to the conditions of where they arose then, is that what you're saying? Or whether they are major or minor when the re-appear?

I guess you mean vassals that are created from a revived clan? These post-RD new vassal is just like a vassal pre-RD. If your vassal is land locked by your provinces, it is likely that the script will force them to attack you when their military is ready (a full stack, for example). If you mean an existing clan at RD which is beaten down by you and turned into a vassal, they still have the RD penalty.