"I've no idea, Your Grace," Plumm delicately began, "but I can make a good guess. Your uncle Tyrion convinced the mountain clansmen to follow him, and they fought in the Battle of the Green Fork and at Blackwater for House Lannister. In return, your grandfather supplied them with steel arms and armour, and they looted plenty more after the Battle on the Green Fork. Now the wildlings are no longer a thorn in the Valemen's side but a legitimate threat. Last but not least, they have no desire to be ruled by a king sitting in Casterly Rock."