Mern IX Gardener

Mern IX Gardener was King of the Reach and the head of House Gardener when he joined Loren I Lannister against Aegon the Conqueror. At the Field of Fire, Mern commanded the center of an immense allied army and led its charge; the dragonfire that routed his forces killed him and much of his family. His fall was more than a battlefield defeat: when the sole surviving nephew died of his burns three days later, House Gardener ended with him.

Identity and Position

Mern ruled the Reach from Highgarden and was one of the two kings who made common cause against Aegon. He met Loren I Lannister beneath the walls of Castle Goldengrove, seat of House Rowan, where their forces assembled before marching together. Their combined host was described as the mightiest ever seen in Westeros: fifty-five thousand men, including roughly six hundred lords and more than five thousand mounted knights. Mern had brought half again as many men as Loren, a disparity that became the basis of his claim to command the center.

The account presents Mern chiefly through his royal and military role. His confidence is clearest in his description of the allies’ massed strength as an iron fist. His family accompanied him into the campaign: four sons rode beside him, while two young grandsons attended as squires. The presence of these heirs and close kin made the battle’s eventual cost a dynastic catastrophe as well as a personal one.

The Campaign and the Battle Plan

The two kings did not remain long at Goldengrove. Their vast army had to keep moving rather than exhaust the countryside around it, so they marched north by northeast through tall grass and golden wheat. Aegon, encamped beside the Gods Eye, learned of their approach and advanced to meet them. His force was only about a fifth the size of theirs, and many of his men were riverlords whose loyalty to House Targaryen was recent and untested. The smaller host, however, could move more quickly.

The armies met on open plains south of the Blackwater, near the route the Goldroad would later follow. The ground seemed to favor the allies: it was firm, level, and suited to heavy cavalry, with no rain for more than a fortnight. Mern claimed the honor of commanding the center because of his numerical advantage. His son and heir was placed in the vanguard; Loren and his knights formed the right, and Lord Oakheart the left. Their plan was to sweep around Aegon’s flanks and attack from the rear while the armored center broke through the opposing line.

Aegon drew his smaller force into a rough crescent, with spears and pikes in front, archers and crossbowmen behind, and light cavalry on the wings. He entrusted command on the ground to the Lord of Maidenpool and intended to fight from the air with his queens. The dry grass and ripe wheat that had made the plain appear so favorable to a cavalry charge also created the conditions for the battle’s decisive reversal.

The Field of Fire

The allied army advanced beneath its banners to the sound of trumpets, horns, and drums. Mern led the central charge on a golden stallion, accompanied by his son Gawen carrying the Gardener banner. The attackers rode through a storm of arrows and swept aside the Targaryen spearmen, breaking their ranks. By then, however, Aegon and his sisters were airborne.

Aegon flew over the advancing ranks on Balerion and repeatedly attacked them with dragonfire. Rhaenys and Visenya set fires upwind and behind the enemy. The dry grass and wheat caught quickly; wind spread the flames and carried smoke into the faces of the charging men. Their mounts panicked, and the smoke blinded horses and riders as the allied formations began to break. Men who emerged from the fire were met by the force commanded on the ground, whose soldiers had waited upwind. The battle became known afterward as the Field of Fire.

The source records more than four thousand deaths in the flames and another thousand from swords, spears, and arrows. Tens of thousands suffered burns. Mern was among the dead, together with his sons, grandsons, brothers, cousins, and other kin. One nephew survived for three days before dying of his burns. The account’s stark succession of losses ends with the extinction of House Gardener: the family’s last surviving member did not outlive the battle by long.

Defeat and Dynastic Consequences

The allied defeat was sharply disproportionate. Aegon’s side lost fewer than a hundred men, while the two kings’ enormous host was destroyed or scattered. Loren survived by riding through flame and smoke after recognizing that the battle was lost. Captured the following day, he laid down his sword and crown, knelt, and paid homage to Aegon. Aegon then confirmed him in his lands and lordship, naming him Lord of Casterly Rock and Warden of the West. Loren’s bannermen followed his example, as did many surviving lords of the Reach.

Mern’s death therefore marked the end of the Gardener kings, while the survival and submission of other lords allowed Targaryen rule to take hold without replacing every defeated house. Aegon’s later policy sought to reconcile the conquered kingdoms by drawing former enemies and their families into court and fostering marriages between noble houses from different regions. The narrative sets that work of political integration against the scale of the conquest: the Field of Fire annihilated Mern’s dynasty, but the victors’ settlement depended on surviving lords becoming participants in a united realm.