0.95 Can you cancel non-aggression pacts?
So Magnar started off giving me (Pariden) Gildar tributes and was all nice, so I accepted their non-aggression pact. They are now spreading like a cancer across the map, and are about to send pioneers through my territory, heading towards the only direction I can now expand. I want to cancel the non-aggression pact before they enter my territory to prevent this. I can't seem to do this in the diplomacy, however. Is it possible, or must I wait for it to expire? The declare war option is also greyed out.
Cheers!