The Battle of Borleias, occurring in 27 ABY amidst the broader Yuuzhan Vong War, saw Yuuzhan Vong invaders seize Borleias. This was a component of Tsavong Lah's strategic Battle Plan Coruscant, with the planet serving as a launchpad for their assault on Coruscant, effectively circumventing the formidable Bilbringi Shipyards. A key element of their strategy involved deploying dovin basals onto the Blackmoon, employing a modified version of the Yo'gand's Core maneuver to systematically dismantle the planet's orbital defenses throughout its 32-hour orbital period. In the aftermath of this invasion, Borsk Fey'lya, holding the position of Chief of State, issued directives mandating collaboration between all officers of the New Republic Defense Force and the New Jedi Order. It was during this conflict that Tsavong Lah acquired his radank limb from Vaecta.
Subsequently, New Republic forces re-captured the system, marking a pivotal shift in the overall trajectory of the war.