"All units, this is Grand Moff Tarkin. We have detected an enemy carrier shifting into realspace from lightspeed in Sector Seven, at two thousand, two hundred kilometers' distance from the station, repeat, enemy carrier in Sector Seven. The vessel is identified as the Fortressa, a Lucrehulk-class carrier. Star Destroyers are moving to engage, but we expect the enemy to launch fighters. They pose a risk to the station. Stop them."
―Grand Moff Wilhuff Tarkin briefs TIE starfighter pilots on the threat posed by the Fortressa[src]
"Grand Moff Tarkin. We're en route to the station, and it seems there is some interesting activity out there." "Nothing we can't handle. Though you might want to circle around and avoid it." "By it, you mean that enemy carrier and all those X-wings pouring out of it?" "Yes. That area is about to become inhospitable." "You're sending in Star Destroyers?" "I was, but as of this moment, I have a better idea." "Ah." "Precisely."
―Admiral Natasi Daala confers with Grand Moff Tarkin during the Fortressa's approach[src]
In 0 BBY, the Alliance learned of the location of the Death Star, an immense battlestation armed with a superlaser capable of destroying planets. The Death Star was under guard in the Horuz system,[4] located in the Atrivis sector of the Outer Rim Territories,[7] and the Fortressa was assigned to attack the station before it became operational and attempt to destroy it using its starfighter complement. From a tactical viewpoint, the Fortressa presented the best option of success. Rather than use the Alliance Fleet in an attempt to engage the Star Destroyer force guarding the Death Star, which would have been costly in terms of manpower and material for the nascent Rebellion, the large number of starfighters from the Fortressa had a greater chance of slipping through the defensive screen and inflicting damage upon the battlestation. Even if the attack only delayed the construction of the superweapon, the Alliance could claim a tactical victory.[4]
Decanting from hyperspace, the Fortressa was faced with the Death Star, a Star Destroyer escort, and ten squadrons of TIE/LN starfighters in the middle of a training exercise. When the Fortressa registered on Imperial sensors, the TIE fighters and Star Destroyers were immediately ordered to intercept, while a further thousand TIEs were launched from the battlestation. The Fortressa responded by launching 250 X-wings in the first wave, followed by a further wave of equal numbers, totaling five hundred. A squadron of Alliance fighters broke off from the main group to engage a starship carrying AdmiralNatasi Daala to the station. The Imperial ship was able to destroy its attackers, but it lost its bridgedeflector shields in the process. An explosion on the command deck caused by the attack injured Admiral Daala, leaving her with a head wound.[4]
Grand MoffWilhuff Tarkin, in command of the Death Star, had initially planned to engage the Alliance ship in a conventional space battle, but reconsidered the approach and ordered the TIEs and Star Destroyers to break off their intercept. Instead, he communicated with the gunnery crew manning the superlaser and ordered them to target the Fortressa. The crew complied, and—using only four percent of the weapon's capability—vaporized the Fortressa in a single shot. The fighters that the carrier had launched continued their mission; the first wave of X-wings outnumbered the initial TIE picket line by two-to-one, and they flew in a non-evasive pattern in an attempt to punch through the TIE defensive screen and attack the Death Star directly. The defending TIEs employed a zone defense, and the X-wings did not attempt to engage the Imperial force, only shooting at TIEs if they were in their path to the battlestation. Around eighty X-wings broke through the first TIE line, but they were soon destroyed by the second wave of Imperial fighters launched from the station. None of the X-wings from the second wave broke through the TIE defensive line.[4]
The Fortressa was the Death Star's first kill, and the first successful test of the battlestation's superlaser. However, the carrier's attack led to Tarkin choosing to relocate the Death Star to avoid detection and a possible full-scale battle with the Alliance Fleet.[4]
↑ 3.03.13.23.3Death Star states that the Fortressa is 3,000 meters long and three kilometers wide. The official site'spage on the Trade Federation battleship gives the vessel's exact dimensions. This article assumes that the Fortressa complies with these specifications in terms of size.