Skirmish in the Barabesh system

During the First Order–Resistance war, and by extension the Hunt for the Colossus, there was a skirmish in the Barabesh system above Castilon, which directly followed the rescue of Tamara Ryvora. The skirmish was the last in a series of attempts by the First Order to track down and capture the supertanker fuel depot known as the Colossus.

Prelude
The First Order's hunt for the Colossus had been going on for some time, beginning after the attack on Castilon. After a massacre led by the First Order on Aeos Prime, Tamara "Tam" Ryvora sought to defect from the First Order and rejoin her old allies on the Colossus. Members of the Colossus Resistance Kazuda Xiono, Jarek Yeager, and CB-23 led the rescue effort of Ryvora, and though successful, were later recaptured by Commander Pyre and Agent Tierny.

Xiono, Ryvora, CB-23, and Yeager attempted to escape from the Star Destroyer that they were being held on, and sent out a transmission telling the Colossus to escape after Jace Rucklin provided intel to the First Order regarding the supertanker's location. Meanwhile, Captain Imanuel Doza and his wife and daughter were attempting to rally the citizens of the Colossus to support Xiono's mission.

After receiving Xiono's transmission, the Colossus' citizens eventually rallied to the cause, deciding to fight against the First Order rather than run away. Meanwhile, Xiono, Yeager, and Ryvora had been captured and relocated to the bridge of Pyre's Star Destroyer, though CB-23 had managed to hide.

The skirmish
Pyre's Star Destroyer arrived at the Colossus' location, and launched a squadron of TIE fighters to attack the supertanker, as the Star Destroyer itself also began to bombard the station. The Colossus, in turn, launched fighters from Ace Squadron and Jade Squadron in an attempt to defend itself. Despite the First Order's superior numbers, the Resistance squadrons made quick work of many of them. However, the Colossus' shields were deteriorating at a rapid rate compared to that of the Star Destroyer's.

On the Star Destroyer itself, CB-23 worked to disable the shields of the vessel. After successfully doing so, a brief attack run led by Ace Squadron led to the disorientation of the Star Destroyer, allowing Xiono, Ryvora, and Yeager to escape the bridge and trap Tierny inside. The trio quickly made their way to the Star Destroyer's hangar to board a transport shuttle and escape.

Another explosion briefly trapped the Resistance members on the Star Destroyer, though they managed to board a shuttle after a brief fight with Pyre, who was rendered unconscious. During this fight, CB-23 was also disabled.

Ace and Jade Squadrons meanwhile led one final attack run on the Star Destroyer, causing the capital ship to explode just as Xiono, Ryvora, Yeager, and CB-23 escaped. All First Order crew members, including Pyre and Tierny, were killed.

Aftermath
After defeating their pursuant, the citizens of the Colossus celebrated both their victory and their reunion with Tamara Ryvora. Kazuda Xiono, Torra Doza, and Jarek Yeager eventually assisted the larger Resistance during the battle of Exegol, piloting the Fireball, Blue Ace, and Yeager's racer respectively.

Behind the scenes
The skirmish in the Barabesh system first appeared in "The Escape", the final episode of Star Wars Resistance Season Two.