The Raid over Corulag was a Rebel attack on one of Grand Moff Tarkin's research stations orbiting the planet Corulag.
During Operation Skyhook, Mon Mothma ordered a further investigation into the nature of the Death Star. Using data already collected, the Rebels discovered that cargo shipments to a research station doing work on the Death Star were being sent from the Vergesso Asteroids. Raymus Antilles personally recruited Han Solo, despite Solo's reluctance, to plant a tracking device and EMP in one of the cargo containers bound for the research station.
The tracking device revealed the station's location over Corulag, and then triggered the EMP and paralyzed Imperial security forces arround the station, including Imperial starships. While Captain Antilles led a team to attack the stunned defenses, a group of Rebel troopers managed to penetrate the station in RM-09 Alliance shuttles. But the Imperial defenses quickly recovered their ability to fight. Meanwhile, Rebel soldiers were delayed in the station by the Imperial infantry. They eventually managed to recover valuable data, just when the Star Destroyers began to engage the Rebel fleet. The soldiers evacuated the station in their shuttles and jumped hyperspace, the rest of the fleet behind them
From the data collected, the team was able to confirm the name of the project—Death Star—and gain an idea of its destructive capabilities, but with no technical schematics detailed enough to reveal a weakness. Mon Mothma then instructed Leia Organa to begin intensified operations to gather relevant intelligence, and assigned Captain Antilles to her service aboard Tantive IV.
This battle was the ninth mission of the Rebel campaign in the 2006 LucasArts computer game Star Wars: Empire at War.
In the mission, Gial Ackbar is rescued in the station by the Rebels. However, this version of the event can not considered canon. A separate, conflicting account of Ackbar's liberation was described in Star Wars: X-Wing and Darksaber, in which Ackbar is rescued during an assassination attempt against Tarkin at Eriadu. This version has been upheld in several Star Wars reference books, including The New Essential Guide to Characters (2002), The New Essential Chronology (2005), and The Complete Star Wars Encyclopedia (2008). Also non-canonical is the presence of Han Solo and Chewbacca, an option because they are not removed from play for this mission. The player does not necessarily have to include the duo in the fleet (though they can).
However, The Essential Atlas (2009) lists this raid as one of the events of Operation Skyhook, but without giving more precisions.