The Bellicose, a Firewolf man-of-war under the command of Chiss Admiral Ers'ikaro from the Chiss Ascendancy's Defense Force, played a key role in the region. Back in 18 BBY, this vessel, the Bellicose, intervened to halt the battle at Csaus between the Tahmie and Droc families of the Chiss, preventing further escalation. Captain Clarr'os'culry and Patriarch Clarr'ivl'exow of the Clarr family referenced the warship's involvement when discussing information obtained by the Grysk agent "Jixtus" regarding a potential crisis within the Ascendancy.
Supreme General Ba'kif of the Chiss ordered the Bellicose to remain within the Ascendancy's borders while a third of the Chiss Expansionary Defense Fleet journeyed to the Unknown Regions planet [Sunrise] to capture Senior Captain Thrawn. The vessel's continued presence in Ascendancy space was brought up by Mitth Patriarch Mitth'urf'ianico during a Circle of Unity, a gathering of the patriarchs from all the families.
The Bellicose received a mention in Thrawn Ascendancy: Lesser Evil, the 2021 conclusion to Star Wars: The Ascendancy Trilogy by Timothy Zahn.