The Imperator II-class Star Destroyer is a first-rate ship of the line employed by the Galactic Empire, and one of the most powerful warships in modern service.
Outgunned only by star-dreadnoughts and the heaviest of defensive battle stations, the Imperator II features vastly greater firepower than the Mk.I model, capable of destroying a Mon Cala Star Cruiser in a matter of seconds. A reinforced superstructure has yielded a thirty-percent increase in overall durability.
Comparatively rare in contrast to the Imperator I and Victory II Star Destroyers, these vessels only first began to appear in service shortly after the Battle of Yavin. Production ended during the post-Endor power struggle, when surviving instances of these vessels served as flagships for the most powerful of Imperial warlords, and did resume until the reign of Emperor Valak, who sought to replenish the depleted Imperial fleet.
Today, Imperator II-class Star Destroyers continue to serve as flagships for the most important fleets in the Galactic Empire. The deployment of one to a sector fleet or task-force is a testament to the importance the Emperor places on the situation at hand, and the mere arrival of such a battleship in a combat theater may persuade rebel forces to withdraw rather than face its wrath.