I haven't read all the posts here, so I don't know how much it's relevant with the discussion, or if it's already been said. Just for information. I've read somewhere that the iDemandRebukedWarProb leader attribute isn't used at all by the game. I've discovered that it's actually called by the Python (CvDiplomacy), not by the SDK. I've tested it right yesterday and it worked. I'm using BTS 3.19.