The squadron Seer takes off from the Vigiliance. Seer identifies a group of viper probe droids that were under the command of the Galactic Empire in the year 3 ABY.
The Vigiliance served as the base of operations for Seer. In 3 ABY, the Rebel Alliance suffered a major defeat at the Battle of Hoth, yet many Rebels managed to escape. The Defiance Task Force was escorting a significant portion of these survivors toward safe territory, and Admiral Holtz was tasked with eliminating this force. His strategy involved deploying numerous viper probe droids throughout the galaxy to locate the Rebel fleet. The Seer group was among the probe groups selected for this crucial mission.
When the fleet was attacked by two A-wings originating from the Mon Calamari Star Cruiser called the Defiance in 3 ABY, the Corrupter Task Force deployed Seer. The Corrupter launched a minimum of two probes belonging to Seer Group, but Ace Azzameen, flying the #2 A-wing, destroyed both of them.