 Only the defiant Dorne remained independent for another two hundred years through asymmetric guerrilla resistance, until it was finally absorbed under the Iron Throne through a marriage-alliance by King Daeron II.The Targaryens built the Iron Throne, forged from the swords of their defeated enemies by dragonfire.They also annexed the land regions of the riverlands and stormlands around the Blackwater Bay as the Crownlands.