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 islands include: Greenshield, ruled by House Chester; Greyshield, ruled by House Grimm; Oakenshield, ruled by House Hewett; and Southshield, ruled by House Serry.
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 Shields Islands were originally known as the Misty Islands. Two thousand years before the events of A Song of Ice and Fire the ironborn were free to sail up the Mander and plunder all the villages and towns all the way to (now Bitterbridge). Torgon Greyiron used Greyshield as his stronghold. King Joron I Blacktyde captured King Gyles II Gardener in a naval battle near the Misty Islands.
The Misty Islands were renamed the Shield Islands once King Garth VII Gardener drove out the ironmen and fortified them with men from the Reach. The Gardener Kings of the Reach armed the fisher folk of the Shield Islands to protect not only themselves, but also the river, thus giving the islands their name.
A Feast for Crows
In 300 ᴀᴄ the Shield Islands are invaded by ironborn led by King Euron Greyjoy. The ironborn fleet successfully outmaneuvers the local island defenses and captures most of their fleet. Euron Greyjoy names new Lords, Harras Harlaw is made Lord of Greyshield, Andrik the Unsmiling Lord of Southshield, Maron Volmark Lord of Greenshield, and Nute the Barber Lord of Oakenshield.
- 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, Driftwood Crowns.
- The World of Ice & Fire, The Iron Kings.
- The World of Ice & Fire, The Old Way and the New.