A conflict unfolded during the inaugural year of the Yuuzhan Vong War above the world of Dibrook. The Yuuzhan Vong launched an assault on the Dibrook Space Station, but their efforts were thwarted by the arrival of the Heart of Artorias.
Prior to this confrontation, the Yuuzhan Vong had secretly constructed a hidden installation on the desolate planet Dibrook. They also concealed a Yammosk beneath the planet's surface.
The Yuuzhan Vong materialized unexpectedly and initiated an attack against the Dibrook Space Station. Commander Bylsma issued orders for his starfighters to engage the enemy, despite the Yuuzhan Vong having disabled the shields of both the station and the fighters. Despite the New Republic's numerical advantage in ships, they struggled to fight effectively without shield protection. Some of the station's inhabitants were captured during the engagement and transported to the surface of Dibrook, where the Yuuzhan Vong had established their base.
The unexpected arrival of the Heart of Artorias, a captured Yuuzhan Vong slaveship, created initial uncertainty within the New Republic command. However, when the vessel began firing on the Yuuzhan Vong, they quickly recognized its allegiance and instructed their starfighters to refrain from attacking it. With the assistance of the Heart of Artorias, the Yuuzhan Vong were soon driven back.
The Heart of Artorias docked with the Dibrook Space Station to embark refugees from the damaged sections. The ship's commanding officer, Kaye Galfridian, discovered that the Yuuzhan Vong had transported some refugees to Dibrook. With the support of the station's commander, she planned a rescue mission.