The Third War of the Races occured 500 years after his defeat in the Second War of the Races, returned to Skull Mountain and once more menaced the peace of the Four Lands.
The Druid Allanon discovered about his return and tried to warn Tyrsis and the armies of Callahorn prepared against the threat of war, but through Stenmin's influence his warnings went unheeded.
Meanwhile a party of heroes left Culhaven to find the legendary Sword of Shannara.
Brona's armies of Trolls and Gnomes burned down Kern and moved to Tyrsis. The Border Legion was rebranded and got out to Mermidon River to stop them. However the monsters were a tousandfold and though they died in huge numbers, they continued their march and swarmed the banks of the river as the Patrol retreated to the walls of Tyrsis.
Eventine Elessedil's Elf archers came to defend Tyrsis.
At dawn the enemy sounded the Death Watch, signaling their intention to destroy the city and everyone within her walls that day. The battle bagan slowly as if the enemy was toying with the defenders. The armies massed for the attack under the sound of wardrums as the skies blackened. A battalion of Trolls charged the gate with a huge ram under the hail of arrows, that was inadequate to stop them. The gates broke and the monsters charged forward against the last defenders. Meanwhile, Stenmin led the monsters through secret passageways.
In the meantime Shea Ohsford confronted Brona in the Skull Mountain and slew him with the Sword of Shannara. Then the earth shook and thunders echoed. The Skull Bearers vanished shrieking and the darkness dispersed. The enemies retreated and the Third War of the Races was over.