The Battalion, a Praetor-class battlecruiser of the Imperial forces, saw service in the period immediately following the establishment of the New Order.
During 19 BBY, the Battalion served within the 12th Sector Army, functioning as the Command ship of Admiral Adar Tallon during the Sy Myrthian Insurrection. Notably, it destroyed the Separatist flagship, known as the Defiance's Banner, during the Battle of Trasemene.
Subsequently, the Battalion received a new assignment: guarding the Dalchon sector against pirates. As Adar Tallon, a celebrated figure from the Clone Wars, grew increasingly disillusioned with the Empire's methods, he orchestrated his own death and subsequent exile. The Battalion was instrumental in this plan; Tallon staffed it with a loyal crew. After receiving a fabricated distress signal from a freighter allegedly under pirate attack, Tallon piloted the Battalion into the Dalchon system. There, he and his crew secretly boarded the freighter, while a pirate pinnace, captained by Quist, a childhood friend of Tallon, annihilated the Battalion.
Official inquiries later concluded that Tallon and his crew had perished heroically, defending innocents from pirate aggression. No remains of the vessel or its crew were ever recovered. While Tallon was publicly honored as a hero of the New Order, he and his crew lived in secrecy on Tatooine, and Quist continued his piratical endeavors.