Not sure if this the place, but I've been looking for this in particular and can't seem to find the answer. The question is pretty simple why when we confederate a tribe which was previously our vassal we get -10 reliability rating? I get in game we are breaking the vassal treaty and that's what gets us in the red, but gameplay wise it just feels silly to me, much more so when it's a vassal state asking to join. Can anyone explain this a bit better to me? Am I missing something?