The Seizure of Whisper Base was a Alliance Special Operations endeavor aimed at seizing control of Moff Lasre Dardano's Whisper Base, located on the planet of Onderon.
To monitor his political rival, Admiral Corlen, Moff Lasre Dardano built Whisper Base on the planet of Onderon. The Rebel Alliance had designs on the base, intending to utilize it as an advanced operational hub. Consequently, four operatives were dispatched. After navigating the dense jungle terrain, they successfully arrived at the base's perimeter.
After severing the communication lines within the garage, they ambushed a squad of Imperial Army troopers and confiscated their code cylinders. Subsequently, they encountered Toor, a BX-series droid commando that had been repurposed as a maintenance droid within the base. Following this, they sabotaged the Lambda-class T-4a shuttle named Nilos to thwart the base commander, Lieutenant Sarev, from making an escape. With these preliminary objectives accomplished, they advanced towards the command center, maneuvering past numerous stormtroopers. Upon gaining entry, they discovered that Sarev had already entered the escape tunnel, en route to the comm station with the intention of alerting Moff Dardano.
Subsequently, they pursued Sarev and triumphed over his AT-ST, thereby securing complete control of the base.
Following the takeover, the operatives solidified their presence within the base, which soon led to them being compelled to defend against a counter-offensive launched by Moff Dardano.
The Seizure is the basis of the campaign in Fantasy Flight Games' 2014 adventure titled Takeover at Whisper Base. The player characters navigate through seven pivotal encounters during the game.