Arlan's grandson, Arlan III Durrandon, conquered the riverlands, which the Storm Kings held for three centuries before losing it to King Harwyn Hoare during the century before Aegon's Conquest. King Arlan I Durrandon extended the domains of his kingdoms as far as the Blackwater Rush and the headwaters of the Mander during the Age of the Hundred Kingdoms.
Īlthough the start and end of this time period has not been specified, several indications are given. Martin spoke of: '.The history of Westeros, and the ages before: the Dawn Age, and the Age of Heroes, and the Age of the Hundred Kingdoms.' It is known that the Dawn Age ended with the signing of the Pact, and that the Age of Heroes began afterwards.
