The Formidable, a Victory-class Star Destroyer of the Imperial navy, received orders to proceed to a crucial Rebel Alliance transfer location within the Delalt system as part of Operation: Clean Sweep.
Upon detecting the Formidable's arrival in their operational area, the Rebels, facing a critical shortage of warheads and anticipating the arrival of a resupply convoy needing to traverse this precise location, initiated a substantial starfighter assault on the Imperial vessel. Responding in kind, the Formidable deployed its complement of TIE/IN interceptors. Unbeknownst to the Rebel forces, an Imperial Fury was positioned nearby, prepared to provide reinforcement to the Formidable if the Rebel attack forced its retreat.
There is some ambiguity regarding whether the "Delalt system," the location of the engagement, is intended to be Dellalt.
Although the space battle portrayed in this mission, including the involved parties, is part of C-Canon, the final result is influenced by the player's choices and therefore remains uncertain. In the absence of additional canonical details, it is reasonable to presume that the engagement did not produce any enduring consequences, such as the loss of a starship.