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So I'm not sure if this is a bug or I just missed a change. But in Mortal Empires playing as Warriors of Chaos, Varg is confederating my vassals, presumably using the "beaten" modifier I generally force on them before vassalising them. since they're doing it basically as soon as they see them near the start of the campaign (I walked over Geomandary) I'm not sure if this is working as intended or if this is just an oversight.