The Westerlands is the gold-rich western kingdom ruled by House Lannister from Casterly Rock. In the history of the Targaryen monarchy, it is both a prize and a political force: its rulers can be defeated and restored, its great houses drawn into royal networks, and its harbors and armies made decisive in civil war. The region’s story moves between accommodation and resistance, with its wealth and geography repeatedly placing it at the center of struggles that begin elsewhere.

Kingdom and Conquest

Before Aegon’s conquest, the Westerlands was one of seven quarrelsome kingdoms, and its neighboring realms were often at war. In Aegon’s youth, House Lannister ruled from Casterly Rock, while the Gardeners held the Reach. The proximity of powerful kings to Dragonstone made the western kingdom part of the political landscape Aegon set out to transform.

The Lannisters joined the Gardeners against him. At Castle Goldengrove, the seat of House Rowan, Loren I Lannister met Mern IX Gardener, King of the Reach. Their combined host numbered fifty-five thousand, including about six hundred lords and more than five thousand mounted knights. Mern called it their iron fist; the scale of the army made their alliance appear capable of ending Aegon’s campaign. Instead, the western and Reach forces were broken by dragonfire.

Loren was captured the following day. He laid down his sword and crown, knelt, and did homage to Aegon. Aegon then restored him to his lands and lordship, confirming him as Lord of Casterly Rock and Warden of the West. Loren’s bannermen followed his example, as did many surviving lords of the Reach. The settlement made the Westerlands an example of conquest followed by accommodation: the defeated ruler retained authority, but under the new king.

Aegon’s later policy sought to make that settlement durable. He brought men and women from across the realm into his court and councils, and encouraged former enemies to send younger children to court as pages, cupbearers, squires, handmaidens, and companions to the queens. There, they saw royal justice and were encouraged to regard themselves as subjects of one realm rather than as westermen or members of other regional peoples. The court thus extended the political work begun when Loren was restored: allegiance was to be cultivated through service and presence as well as secured by victory.

Lords, Refuge, and Royal Progresses

The Westerlands remained a refuge as well as a kingdom of great political weight. During Maegor’s rule, Lyman Lannister gave Rhaena Targaryen and her husband, Aegon the Uncrowned, shelter when Maegor demanded their heads. Lyman’s bastard son, Ser Tyler Hill, had fought beside Prince Aegon beneath the Gods Eye, while Lyman’s wife, Lady Jocasta of House Tarbeck, had befriended Rhaena at Casterly Rock and recognized that she was pregnant. When Rhaena returned, the Lannisters welcomed her and her party; after the rest of her company landed at Lannisport, they too were taken in.

Their reception was deliberately generous. A feast was held in their honor, an entire stable was set aside for Dreamfyre, and Rhaena, her husband, and her companions of the Four-Headed Beast were given a richly appointed suite deep within Casterly Rock. They remained for more than a moon’s turn. The castle’s protection gave Rhaena a place to stay, but her later travels through the west showed how conditional such hospitality could be. She visited the Marbrands of Ashemark, the Reynes of Castamere, the Leffords at the Golden Tooth, the Vances at Wayfarer’s Rest, and the Pipers of Pinkmaiden. At each stop, she encountered unease over the cost of maintaining her party and, more troublingly, interest in Dreamfyre. Rhaena would not give other lords dragons, and the desire for them made her welcome precarious.

Royal progress brought the region into direct contact with the crown in another way. In 55 AC, Jaehaerys Targaryen travelled west after the queen refused to let him cancel or postpone the journey and sent him on alone. Vermithor carried the king to the Golden Tooth, where his retinue joined him. He then visited Ashemark, the Crag, Kayce, Castamere, Tarbeck Hall, Lannisport, Casterly Rock, and Crakehall. Fair Isle was conspicuously omitted, a pointed sign of royal disapproval of its lord.

In 88 AC, Jaehaerys again visited the great seats of the west, this time including Fair Isle because its disliked lord had died. The king stayed longer than intended, inspecting roadworks and making unplanned visits to smaller towns and castles. Princes Aemon and Baelon joined him at different stops, but could not persuade him to return to the capital. After leaving the west, Jaehaerys continued directly into the Reach, turning one progress into the beginning of another. These journeys made royal authority visible beyond the great castles: the king inspected public works and listened to people across the region, while his itinerary could also communicate favor or displeasure.

Hardship and Regional Change

The Westerlands shared in the severe shortages of the winter of 59–60 AC. The North suffered first, but harvests also failed in the Riverlands, the Vale, the Westerlands, and the Reach. As food dwindled, those who still had supplies hoarded them, and the price of bread rose throughout the Seven Kingdoms; meat grew dearer still, while fruits and vegetables nearly vanished from towns and cities. The crisis was not confined to the rural landscape: it altered the availability and cost of food across the realm.

The Shivers carried the hardship into the houses that governed the region. Lyman Lannister died, along with Lord Marbrand of Ashemark, Lord Tarbeck of Tarbeck Hall, and Lord Westerling of the Crag. Their deaths show the scale of the epidemic among the Westerlands’ ruling families. At Highgarden, Lord Tyrell survived the illness but died in a fall from his horse four days after recovering. The loss of Lyman was especially consequential for a kingdom whose lord had served as a protector and political host; the evidence records the death without suggesting that the region’s later conflicts followed from it directly.

Royal infrastructure also tied the Westerlands to the wider realm. By the end of 62 AC, Jaehaerys had provided King’s Landing with cobblestones, cisterns, and fountains and was planning a project across the fields, hills, and bogs between the Dornish Marches and the Gift. During his later western progress, he inspected roadworks as he travelled. The roads were therefore not merely a backdrop to royal movement: their construction and inspection formed part of a kingdom-wide program that connected distant regions to the crown’s administration.

The Westerlands in the Dance of the Dragons

During the Dance, the region’s ports and military resources became targets in a war over the Iron Throne. Dalton Greyjoy, courted by both claimants, chose his side and led longships from the Iron Islands against the Lannister domains. Lady Johanna had barred the gates of Casterly Rock, which the ironborn could not take. They seized most of the ships in Lannisport’s harbor, sank the rest, and sacked the city, taking substantial wealth and more than six hundred women and girls. The attack damaged the west’s maritime strength and brought the cost of the wider succession war directly to its coastal inhabitants.

On land, the Lannister host marched east toward Harrenhal while fighting continued in the Riverlands. Near the western shores of the Gods Eye, it encountered a large opposing army. The battle drove the westermen back into the waters; by nightfall, two thousand men had died, including Lord Lefford and several other notable lords and knights. The Lannister host was shattered. The losses were also severe for the Winter Wolves, who had led the attack and suffered more than two-thirds of the men who had ridden south with Lord Dustin dead or wounded. The defeat left the west’s military power badly reduced at the same time that Dalton Greyjoy was raiding its coasts.

Afterward, the Westerlands remained among Rhaenyra’s enemies, but the Lannister position was precarious. Lord Jason had died in battle, much of the west’s chivalry had been killed or scattered, and the Red Kraken continued to harry Fair Isle and the western shore. In the struggle that followed the fall of King’s Landing, Lord Jason’s four-year-old son Loreon was too young to rule. Authority passed to Jason’s widow, Lady Johanna, and her father, Roland Westerling, Lord of the Crag. Their immediate concern was defending Kayce and retaking Fair Isle, not renewing the contest for the Iron Throne.

Lady Johanna accepted the Sea Snake’s terms: she promised to come to King’s Landing to do obeisance at the new king’s coronation and to send two daughters to the Red Keep as companions to the queen and hostages for her future loyalty. She also agreed to restore the portion of the royal treasury that Tyland Lannister had sent west for safekeeping. Her response reflects the region’s changed position: a powerful house that had once fielded a great army now had to balance royal demands against the immediate danger to its own lands and ports.

Political Significance

Across these episodes, the Westerlands is defined by the tension between local power and royal dependence. Casterly Rock survives conquest through the restoration of Loren I Lannister, while later Lannister lords offer refuge, negotiate with kings, and defend their own territories when the crown’s wars reach the west. Royal progress makes the region part of a shared political realm; famine and epidemic reveal that its great houses remain vulnerable to wider crises; and the Dance exposes how quickly armies, harbors, and dynastic authority can be disrupted.

The region’s significance lies not simply in its wealth, but in the obligations and vulnerabilities attached to it. Its rulers can furnish allies, shelter claimants, provide access to the coast, and influence the balance of a succession war. Yet neither a great castle nor a storied lordship can insulate the Westerlands from defeat, disease, or attacks on its ports. Its recurring place in the account is that of a western stronghold whose power matters far beyond its borders—and whose fortunes are repeatedly reshaped by the struggles of the whole realm.