A battle at the planet Corulag occurred in 29 ABY during the Yuuzhan Vong War. It was a major victory for the Galactic Alliance and provided the new government with control of a key hyperspace route to Coruscant.
Following a summit of Galactic Alliance military commanders at Contruum in the wake of the Defense of Mon Calamari, General Wedge Antilles commanded the Second Fleet in an attempt to liberate the key Core World of Corulag from the hands of the Yuuzhan Vong. Unlike many other New Republic worlds in the Bormea sector, which fought against the Yuuzhan Vong, Corulag's leaders surrendered in hopes of avoiding the collateral damage that their neighbor worlds had suffered. Despite this, the majority of the world's ten billion citizens opposed the puppet government set up by the Yuuzhan Vong. Following the rescue of Judder Page, resistance groups on-planet contacted the Alliance for support in an upcoming rebellion against the Yuuzhan Vong occupation. Eager to aid a former New Republic world and secure a key world close to Coruscant, Sien Sovv and Traest Kre'fey approved the assault.
When the Second Fleet arrived in-system, the situation on the ground had already begun. Resistance groups and citizens alike had turned on their conquerors and had begun revenge attacks on Yuuzhan Vong soldiers. Fighting raged across the surface of Corulag, while parts of the planet experienced orbital bombardment from Yuuzhan Vong warships. The elite fighter units Blackmoon Squadron and Shocker Squadron attacked the world's primary moon, escorting Scimitar assault bombers in runs to destroy a Yuuzhan Vong base.
In space, Alliance capital ships traded fire with Mataloks and other Yuuzhan Vong warships. Several of the Mataloks succumbed to fire from the Elegos A'Kla and the Mon Mothma, determined to protect the lone yammosk carrier. When the Mon Cal cruiser Harbinger arrived and added its fire to the attack, the yammosk vessel was destroyed.
As the battle drew to a close, a squadron of TIE Interceptors commanded by the Peace Brigade attempted to flee the battle, only to be vaporized by Alliance starfighters. As the Yuuzhan Vong fleet in orbit was being destroyed in detail, the resistance appointed provisional governor of Corulag, Forridel, announced the complete victory of the Alliance forces.
Atrocities were reported across Corulag, as frustrated citizens took out their rage on Yuuzhan Vong and collaborators. The former governor, a supporter of the Yuuzhan Vong, was hanged in a city square in the capital city of Curamelle. Despite this, the strategic world had been secured for the Galactic Alliance, who now had a key stop on the Perlemian Trade Route. The victory celebration was short lived, as the Second Fleet immediately was dispatched to Coruscant to aid in the planet's liberation.
- The New Jedi Order: The Unifying Force (First appearance)