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Among the last of its class to be built, the Ballista was sent to Grand Moff Tarkin as replacement for another Victory II undergoing a retrofit at the time. The ship arrived just in time to participate in the Atravis Sector Massacres. Although the assignment was meant to be temporary, the untried crew acquitted themselves well during the campaign, gaining the favour of Tarkin through the zealous pursuit of their objectives. The merciless destruction of two surrendering refugee ships, as ordered, ensured their permanent attachment to Tarkin’s forces in Oversector Outer. The death of Tarkin at Yavin brought Scourge Squadron under the command of Ardus Kaine, who would go on to found the short-lived Pentastar Alignment as a warlord. The ship was assigned to the defense of Seswenna Sector, where it remained throughout its tenure with the faction. With the Alignment’s later absorption by the Imperial Remnant, Ballista found itself transferred to the Kwymar Sector to reinforce the Instigator’s mission there.
In mid-26 ABY, the destroyer joined the Instigator in being deemed too outdated and underpowered to serve Kwymar’s evolving defense requirements. The Dark Council quickly seized the opportunity to purchase the two warships using the funds resultant from Operation Tempest Bravo. Both were then brought to the Xa Fel shipyards until the rest of the new fleet was assembled. Ballista, and its full complement of support craft, was placed under the banner of Clan Plagueis in the aftermath of the Yuuzhan Vong sweep through the Brotherhood’s domain.
It now serves in a planetary defense role over House Satal Keto’s Morroth, equipped with two squadrons of TIE Interceptors (Fortress and Lurker), and the DX-9 Transports Defiant and Shiver.
When in wartime, the Ballista serves as the primary warship in Line B of Task Force Oberon.