Being the largest and most powerful of all Mon Calamari-designed warships, the Viscount and her sister ships were later put to good use during the Yuuzhan Vong invasion. Prior to the Yuuzhan Vong War, she fought rogue Imperial elements while the New Republic consolidated power throughout the galaxy, following the official end of the Galactic Civil War. The subsequent full-scale vessels were 17 km-long dreadnoughts known as the Bounty and the Krakana. The Viscount herself was meant to be a prototype for the design and was built as a battlecruiser at 3 km in length.
By the time it was finished in 25 ABY, so many Super Star Destroyers had been captured by the New Republic, that the government considered halting construction on more ships. The Viscount 's design was worked out after the Black Fleet Crisis when the New Republic military realized the need for more powerful dreadnoughts.