The attack on the Rehz'nor, a Nebulon-B frigate, was a relatively small conflict that occurred during the time of the Galactic Civil War.
The Rehz'nor, a Nebulon-B frigate utilized by the Rebel Alliance and serving as the flagship of Green Squadron, was in the process of receiving supplies, presumably to aid in Operation: Quick Strike. After the supply transfer was finished, the ships of the convoy began their return journey to a secret Rebel base to acquire more provisions when the Imperial Scylla, a Strike-class medium cruiser, emerged from hyperspace and immediately deployed its initial wave of starfighters.
Two X-Wings from Green Squadron launched from their hangar to support two X-Wings from Rogue Squadron, which were already on patrol nearby. These groups engaged the Scylla along with its deployed TIE/IN Interceptors and TIE Bombers, while the Rebel convoy ships began their jump to hyperspace. The Scylla tried to move in front of the convoy to engage them at a distance from the Rehz'nor's weaponry, but the X-Wings of Green Squadron consistently interfered. The YT-1300 light freighter Outlaw completed its docking and briefly participated in the battle, before retreating to hyperspace after using all of its missiles against the TIE fighters.
After a few minutes of fighting, with nearly all of the Scylla's fighters destroyed, the Victory-class Star Destroyer Triumph arrived from hyperspace, launching its own group of TIE Bombers. Shortly after this, the Scylla disengaged and jumped to hyperspace.
As Rogue and Green Squadrons eliminated the remaining fighter threat, the Rehz'nor began to directly exchange fire with the Triumph. With the assistance of the X-Wings from Green and Rogue Squadrons, the Triumph's shields were depleted, and the vessel maneuvered to jump to hyperspace, leaving the Rehz'nor damaged but still operational.
This battle's exact time and location are not definitively known, as it appears as a two-player training mission within the Star Wars: X-Wing vs. TIE Fighter game. This is the only known appearance of the Nebulon-B frigate Rehz'nor other than the Battle of Gaerboud IV. It is likely that this battle occurred around the same time and in the same region, as both were included in the initial release of Star Wars: X-Wing vs. TIE Fighter and represent the only times the Rehz'nor has been seen.
It is possible for players to destroy both the Scylla and the Triumph during the mission; however, the Scylla will escape to hyperspace if ignored, and the Triumph will attempt to retreat to hyperspace once its shields are down, leaving their ultimate fates ambiguous. Similarly, the mission objectives can be completed even if one of the Cargo Ferry group Gefion is destroyed, which raises the possibility that Gefion 3 (the first ship attacked by the Scylla) was destroyed during the skirmish.
The presence of the Triumph in this mission could be a reference to the Victory-class Triumph that was released in 1996, one year before the release of Star Wars: X-Wing vs. TIE Fighter in 1997. If this is the case, it would solidify the ship's Legends designation as a Victory-class Star Destroyer.