Solemn Penance

This Covenant assault carrier served as the flagship and personal transport of the Prophet of Regret during the Battle of Earth, specifically the Battle of Mombasa, and during the Battle of Installation 05. Regret used this vessel to lead his fleet's ill-prepared assault on Earth.

Battle of Earth
The ship arrived in the Sol System on October 20th, 2552, as a part of a relatively small task force, composed of itself, another assault carrier, and thirteen s, expecting to find and uncover the entrance to the Ark. Instead, they emerged from Slipspace into the heavy defenses of the UNSC Home Fleet, defending humanity's. While the cruisers engaged the human warships and orbital defense platforms, the assault carriers used boarding parties of Sangheili and Unggoy to carry antimatter charges onto three platforms, intending to blast a hole large enough for them to circumvent the defenses and reach Earth's surface. Though two OPDs were successfully destroyed, the second assault carrier was destroyed by SPARTAN John-117, who used the bomb that was intended to destroy Cairo Station. However, Regret's ship continued unimpeded, descending to New Mombasa, in Kenya, Africa.

Battle of Mombasa
While hovering over the city, the ship deployed massive numbers of ground infantry and heavy equipment, including two Scarabs, intending to drive the UNSC out of the area and begin its excavations. Soon, John-117 and dozens of Marines began an assault on the carrier's landing zone in Uplift Nature Reserve. Eventually, faced with the possibility of being overrun on the ground and intercepted by UNSC ships if it tried to escape to orbit, Regret ordered a retreat. The carrier activated its Slipspace drive, making an emergency jump, with the UNSC frigate In Amber Clad following it into Slipspace. The shockwave from the Slipspace rupture severely damaged the city, releasing a potent electromagnetic pulse and partially damaging the city's urban infrastructure AI, the Superintendent. The jump also foiled the attempt of an Orbital Drop Shock Trooper force to infiltrate the carrier from above, scattering their drop pods around the city and killing most of the troopers.

Battle of Installation 05
On November 2nd, Regret's assault carrier exited Slipspace near Installation 05 and immediately began deploying forces to the surface. Regret pleaded with the Prophet of Truth, apologizing for his rash actions. Meanwhile, In Amber Clad arrived at Installation 05. UNSC forces, again spearheaded by John-117, hunted the Prophet; the SPARTAN soon assassinated him. After this, the carrier used its energy projector to level the temple where the Prophet had been based in an attempt to kill "the Demon". The attempt was unsuccessful. The vessel's fate following the outbreak of the Great Schism is unknown.

Trivia

 * In Halo 2 Regret's Assault Carrier features structures and the end of the ship, however in Halo 3:ODST Regret's Assault Carrier is just a standard Covenant assault carrier.

List of appearances

 * Halo 2
 * Halo 3: ODST
 * Halo: Ghosts of Onyx