House Lannister

House Lannister is the ruling house of the Westerlands, based at Casterly Rock, and one of the principal powers of the region before and after Aegon’s conquest. Its history in the account is shaped by the balance between force and accommodation: Loren I Lannister joins the Reach against the Conqueror, survives the Field of Fire, and submits; later generations consolidate relationships through marriage and service at court. After the Dance of the Dragons, Lady Johanna Lannister leads the house’s resistance to ironborn raiding and pursues a costly campaign to secure the Iron Islands for her son.

Seat and Regional Power

In Aegon’s youth, the gold-rich Westerlands were ruled by the Lannisters of Casterly Rock. The house belonged to the divided political order that the Conqueror set out to overcome: neighboring kingdoms repeatedly fought one another, and the kings nearest Dragonstone included Harren the Black and Argilac the Arrogant. The account establishes House Lannister as a leading western power, but its importance emerges most clearly through the choices of its rulers when conquest and later succession crises threatened the balance of the realm.

That regional influence also made the house’s allegiance valuable to claimants beyond the Westerlands. During the rebellion of Aegon the Uncrowned, Casterly Rock was reluctant to declare openly for the prince. Nevertheless, five hundred men from Lannisport joined his cause under Ser Tyler Hill, a bastard son of Lyman Lannister. The arrangement allowed supporters to aid the prince while the Lord of Casterly Rock kept his own position ambiguous in case Maegor prevailed. House Lannister’s role here is not a simple commitment to one side: its resources could be brought to bear while its leadership preserved room to maneuver.

The Conquest and Loren’s Submission

When Mern IX Gardener and Loren I Lannister united against Aegon, they assembled the largest host yet seen in Westeros: fifty-five thousand men, including more than five thousand mounted knights. The scale of the alliance made the battle that followed decisive. At the Field of Fire, Aegon attacked from Balerion while his queens, Rhaenys and Visenya, set fires that trapped and disoriented the advancing army. More than four thousand died in the flames, and many more were killed by weapons or suffered lasting burns. Mern and his heirs died; with the death of his last surviving nephew three days later, House Gardener ended.

Loren I Lannister escaped through the fire and smoke when he saw the battle was lost. Captured the following day, he laid down his sword and crown, knelt, and paid homage to Aegon. Aegon then raised his defeated opponent and confirmed him in his lands and lordship, naming him Lord of Casterly Rock and Warden of the West. The submission preserved House Lannister’s regional position under the new regime, in sharp contrast to the destruction of its former ally. Loren’s bannermen followed his example, as did surviving lords of the Reach.

Marriage and the Wider Realm

After the conquest, Aegon and his queens sought to reconcile the kingdoms not only through royal justice and the incorporation of former opponents at court, but also through marriages between noble houses from distant parts of the realm. Aegon encouraged the children of former foes to attend court, where they could witness the workings of the new government and form ties beyond their home regions. In this political setting, Loren I Lannister’s eldest son and heir married a Redwyne girl from the Arbor. The match linked the ruling house of the Westerlands to a family from another major region, turning marriage into one of the instruments used to bind the conquered territories together.

The house’s later political landscape remained connected to questions of inheritance and alliance. Corlys Velaryon and Princess Rhaenys sought support for their son Laenor at the Great Council of 101, but the assembled lords chose Viserys by a reported margin of more than twenty to one. The account presents that decision as a precedent favoring male claimants to the Iron Throne. It does not specify a Lannister position in the vote, but this realm-wide precedent later mattered to the political calculations of rival factions, including those seeking support among the great houses.

Court Service and the Dance

House Lannister’s influence also appeared through office and access to royal resources. During the Green Council’s preparations for Aegon II’s accession, Ser Tyland Lannister replaced Lord Beesbury as master of coin and moved at once to secure the Crown’s treasury. He divided the gold into four portions: one was placed with the Iron Bank of Braavos, one sent under guard to Casterly Rock, one to Oldtown, and the remaining wealth reserved for gifts, bribes, and possible sellswords. This role placed a Lannister at the center of the faction’s preparations and made the family’s seat one of the destinations for royal funds.

The account also shows how quickly the house’s interests could be caught up in the aftermath of the Dance. The coronation of Aegon III did not end fighting in the west. Lady Johanna Lannister, ruling for her young son Loreon, continued to resist the raids of Dalton Greyjoy’s ironborn. She repeatedly sought help from the king’s Hand, who was the twin brother of her late husband, but no aid arrived. Facing the danger herself, she put on mail and led the men of Lannisport and Casterly Rock against the raiders. The songs credit her with killing ironmen beneath the walls of Kayce, but the account rejects that embellishment: she carried a banner, not a sword. Her leadership nonetheless helped rally the western forces, the raiders were routed, and Kayce was saved. The dead included the Red Kraken’s favorite uncle.

Johanna’s Campaign in the Iron Islands

The conflict continued after Dalton Greyjoy’s death, when competing claimants fought for power in the Iron Islands. Lady Johanna sought to install her son’s rule and enlisted Ser Leo Costayne, who brought a fleet and landed Lannister forces on Pyke, Great Wyk, and Harlaw. Lord Oakenfist had refused to join the Lannister vengeance against the ironborn, but Costayne was persuaded by Johanna’s appeal and possibly by her promise to marry him if he delivered the islands to Loreon. The effort failed to achieve that aim: Costayne was killed on Great Wyk, and three-quarters of his ships were captured or sunk.

The failed attempt was followed by extensive destruction. Lannister forces burned longships, fishing boats, homes, and villages, and killed ironborn families wherever they found them. Among the dead were two of the Red Kraken’s sisters and their husbands, several prominent island lords, and nine of his cousins; starvation claimed further lives after Lannister forces carried away stored grain and salt fish or destroyed what they could not take. Toron Greyjoy remained on the Seastone Chair after defenders beat off the assault on Pyke. Rodrik Greyjoy, his half-brother and rival, was captured and taken to Casterly Rock, where Lady Johanna had him gelded and made him her son’s fool. The campaign therefore inflicted severe losses without securing the whole archipelago for House Lannister, leaving the house’s bid for control unfinished.