The Pyria system, alternatively referred to as the Borleias system, was a star system situated within the Colonies area of the galaxy, bordering the Galactic Core. Orbiting the star named Pyria, it encompassed the planets Borleias and Pyria VI, along with the Blackmoon, and the Versieds asteroids field. It was positioned mere hours away from both the Mirit and Venjagga systems.
The Blackmoon system and Phenaru system were the codenames assigned to it by the New Republic.
During 27 BBY, the Outbound Flight mission traversed this system during its journey from Yaga Minor en route to the Unknown Regions.
Borleias, the system's fourth planet and its sole inhabited world, played a significant role. During the Galactic Civil War, it served as the operational headquarters of Imperial General Derricote. Following the New Republic's triumph over the Imperials, Borleias was fortified to serve as an advanced base, even as Warlord Zsinj's ships initiated reconnaissance incursions into the system.
In 27.5 ABY, amidst the Yuuzhan Vong War, Borleias functioned as a New Republic stronghold. Its loss directly contributed to the Battle of Coruscant. Later, the system became the location of a crucial battle, culminating in the destruction of a substantial Yuuzhan Vong force, including the Domain Hul worldship, and marking a significant moral victory for the New Republic.
In 40 ABY, Jacen Solo proposed ceding the system to the Imperial Remnant in exchange for their support of the Galactic Alliance at the Second Battle of Fondor.