The Oppressor, a Harrower-class dreadnought, functioned as the flagship under the command of Darth Angral throughout the duration of the Cold War.
During the Cold War, Darth Angral utilized the Harrower-class dreadnought, known as the Oppressor, dispatching his apprentices in pursuit of the Republic's super weapons.
He carried out the execution of Orgus Din directly from the bridge of this warship, broadcasting the event live across the HoloNet.
Ultimately, the ship met its end during an assault on Tython. A Jedi Knight, accompanied by the Padawan Kira Carsen, infiltrated the vessel, sabotaging its power generators and ultimately slaying Darth Angral.
The initial appearance of the Oppressor occurred within The Old Republic, Threat of Peace Act 1: Treaty of Coruscant, a part of the Threat of Peace webcomic series that served as a prequel to the video game Star Wars: The Old Republic. Given the comic's release in 2009, which predated the game's release in 2011 by a couple of years, the Oppressor's design differed noticeably from the final Harrower-class dreadnought design.