The Imperial II-class Star Destroyer, also known as the Imperial II-class Destroyer and colloquially the "ImpStar Deuce", was a Star Destroyer model that was derived from the Imperial I-class Star Destroyer. The Imperial II-class Star Destroyer is used by the Axis Navy
Several differences existed between the Imperial I and Imperial II-class Star Destroyer, including the replacement of the tractor beam targeting array between the command tower's sensor globes with a communications tower, as well as the removal of point defense weaponry.
The Imperial II was built with a heavily reinforced hull, stronger deflector shields, and greater firepower than the original Imperial I class. The prominent quad heavy turbolaser and heavy ion cannon turrets flanking the surface of the Imperial I-class Star Destroyer were also replaced with batteries of eight-barreled turbolasers or ions in unarmored barbette mountings. Another new feature included two parallel "claws" for grappling smaller starships placed in the ventral secondary docking bay.
The Imperial II-class Star Destroyer was not without problems. The Errant Venture, formerly the Virulence, was continually breaking down due to lack of maintenance. During the height of the Rebellion, an Alliance Special Operations man said that the Star Destroyer had 174,000 design flaws waiting to be exploited.The command deck was also a vulnerability, as the ship's operations were coordinated there.
Despite these flaws as well as the vast resources required to maintain and crew the vessels, they nevertheless remained formidable front line units, even when compared to more efficient and modern designs such as the Nebula-class and Turbulent-class Star Destroyers.