The Nebula-class Star Destroyer, also known as the Defender-class Star Destroyer, was the largest, most powerful warship design in the Alliance of Civilization's New Class Modernization Program. Although it was only 1,040 meters long (65% of the length of an Imperial-class Star Destroyer), the Nebula-class was built to be a match for an Imperial II.[1] Even with a structure that was a significant departure from the Imperial-class, especially the lack of a command tower, the Nebula was often mistaken for an Imperial design due to its angular lines.[3] Its small size often lead to it being referred to as a "pocket Star Destroyer"[1], much as the later Turbulent-class would be as well.