The Shield Islands, commonly called the Shields or Four Shields, are four islands of the Reach. They are located in the Sunset Sea west of Highgarden and protect the Mander river from the Iron Islands. The ruling houses are House Chester of Greenshield, House Grimm of Greyshield, House Hewett of Oakenshield, and House Serry of Southshield.
When any sign of longships is spotted, elders in watchtowers light beacon fires, which in turn cause other watchtowers to light their own beacons and spread the warning to settlements further inland so they will not be caught unaware.
The Shield Islands were originally known as the Misty Islands. Thousands of years ago, the ironborn were free to plunder villages and towns along the Mander and its tributaries. Torgon Greyiron used Greyshield as his stronghold. King Joron I Blacktyde captured King Gyles II Gardener, King of the Reach, in a naval battle near the Misty Islands.
The Misty Islands were renamed the Shield Islands once Garth VII Gardener drove out the ironmen and fortified them with men from the Reach. The Gardener kings armed the fisher folk of the Shield Islands to protect not only themselves, but also the river, thus giving the islands their name.
During her search for the missing Aerea Targaryen, Rhaena Targaryen and her dragon, Dreamfyre, were seen flying over the Shields and the Arbor. King Jaehaerys I Targaryen and his granddaughter, Princess Rhaenys, visited the Shields in 89 AC.
Prince Daeron Targaryen forced the submission of the Shields to King Aegon II Targaryen during the Dance of the Dragons. Galleys from the Shields joined the fleet of Lord Alyn Oakenfist when he sailed to confront Lord Dalton Greyjoy.
A Feast for Crows
In 300 AC the Shield Islands are invaded by ironborn led by Euron Greyjoy, King of the Isles and the North. The ironborn ships outmaneuver the local island defenses and captures most of their fleet. Following the taking of the Shields, Euron names Harras Harlaw as Lord of Greyshield, Andrik the Unsmiling as Lord of Southshield, Maron Volmark as Lord of Greenshield, and Nute the Barber as Lord of Oakenshield.
A Dance with Dragons
In ancient days, the ironborn had boldly sailed the river road and plundered all along the Mander and its vassal streams ... until the kings of the green hand had armed the fisherfolk on the four small islands off the Mander's mouth and named them his shields.—thoughts of Victarion Greyjoy
- A Feast for Crows, Chapter 32, Cersei VII.
- A Feast for Crows, Chapter 29, The Reaver.
- A Feast for Crows, Appendix.
- A Dance with Dragons, Chapter 26, The Wayward Bride.
- The World of Ice & Fire, The Iron Islands: Driftwood Crowns.
- The World of Ice & Fire, The Iron Islands: The Iron Kings.
- Fire & Blood, Jaehaerys and Alysanne - Their Triumphs and Tragedies.
- Fire & Blood, The Long Reign - Jaehaerys and Alysanne - Policy, Progeny, and Pain.
- Fire & Blood, The Dying of the Dragons - Rhaenyra Triumphant.
- Fire & Blood, Under the Regents - The Voyage of Alyn Oakenfist.
- The World of Ice & Fire, The Iron Islands: The Old Way and the New.
- A Feast for Crows, Chapter 36, Cersei VIII.
- A Dance with Dragons, Chapter 56, The Iron Suitor.