Assigned to Darth Vader's Death Squadron, the Imperial Star Destroyer Tyrant was commanded by the capable Captain Xamuel Lennox, with Lieutenant Cabbel serving as executive officer.
In 1 BBY, the Tyrant was one of the ten Imperial Star Destroyers involved in the Battle of Turkana.
Eight months after the Battle of Yavin, the ship fought Warlord Nuso Esva's forces in the Poln system as part of Death Squadron.
During the Battle of Hoth, Tyrant attempted to intercept the first Rebel transports to flee from Hoth, but was disabled by several shots from the Rebels' planetary ion cannon. Lennox's warship was left to float through the system, and several more Rebel transports subsequently escaped.
During the battle on the surface, Imperial troops captured Rebel General Crix Madine and sent him to the Tyrant. After the shuttle entered the Tyrants docking bay, the Tyrant was hit by another blast from the planetary ion cannon. While overseeing the repair of systems disabled by the ion cannon, Rebel commandos boarded the ship and rescued Madine. The commandos escaped with General Madine on a Lambda-class shuttle, with the Tyrant unable to pursue the shuttle. Later, the shuttle brought General Madine to the Mon Calamari Cruiser Champion, which then prepared to jump to hyperspace. Lennox engaged the cruiser with the now functional Tyrant, and proceeded to launch TIE fighters in preparation for battle. Lennox hailed the Champion and said that if they handed over General Madine, he would call off his attack. The captain of the Champion refused and ordered the launch of his ship's fighters. Captain Lennox was unable to defeat the Champion, and the ship escaped with Madine.
In 4 ABY, Captain Lennox and the Tyrant participated in the Battle of Endor.
Later, in the aftermath of the Bacta War, the New Republic captured the Tyrant from a weakly defended Imperial fueling outpost. Impressed by the symbolism of the Star Destroyer's former history serving with Vader's Death Squadron, Councilor Leia Organa renamed the ship the Rebel Dream and selected it as her personal flagship.
By 7 ABY, the Rebel Dream was serving as Minister of State Leia Organa Solo's consular ship, but was back in active duty to fight the Imperial Star Destroyer Peremptory at the Battle of Storinal. In this battle, Rebel Dream was recaptured by Imperial forces.
At the time of the Yuuzhan Vong War, the New Republic had recovered the Rebel Dream.
The Rebel Dream served under General Wedge Antilles at Borleias. The Rebel Dreams starfighters and support craft featured a white-and-dark-gray color scheme during the siege of Borleias. It later joined the fleet of the fledgling Galactic Federation of Free Alliances, where it participated in the defense of Mon Calamari.
The image of the Tyrant in the Star Wars Encyclopedia features a faint inscription on the hull that reads, "We Break For Nobody," echoing a similar phrase, "We Brake for Nobody," inscribed on the mammoth starship Spaceball One depicted in the 1987 parody film Spaceballs.
- Star Wars: The Empire Strikes Back - Official Collectors Edition
- Star Wars Encyclopedia
- Star Wars: Behind the Magic
- The Essential Chronology
- The Official Star Wars Fact File4
- The Official Star Wars Fact File11
- The New Essential Chronology
- "The Empire's Finest: Who's Who in the Imperial Military" — Star Wars Insider 96
- The Complete Star Wars Encyclopedia
- The Essential Atlas
- Star Wars: The Card Game — A Dark Time
- Star Wars: The Card Game — Escape from Hoth
- Star Wars: Age of Rebellion Core Rulebook
- Star Wars: Imperial Handbook: A Commander's Guide