Estermont was conquered shortly after Tarth during the coming of the Andals to the stormlands. Peace in the region was eventually achieved when the Durrandons and their First Men bannermen intermarried with the Andals.
Some Storm Kings kept war fleets at Estermont.
A Dance with Dragons
—writings of Gyldayn
- A Feast for Crows, Chapter 24, Cersei V.
- Fire & Blood, Jaehaerys and Alysanne - Their Triumphs and Tragedies.
- The World of Ice & Fire, The Stormlands: House Durrandon.
- The World of Ice & Fire, The Stormlands: Andals in the Stormlands.
- The World of Ice & Fire, The Stormlands: The Men of the Stormlands.
- A Dance with Dragons, Chapter 61, The Griffin Reborn.