

As the war neared its end in 19 BBY, the production lines of new Imperator-class and Tector-class destroyers expanded, while the lines for the older, lighter Venator-class slowed down.

The Imperator-class was designed as a massive, powerful, mid-sized warship, and appeared in limited numbers during the Clone Wars, where it served in several Republic task forces. Compared to most common frigates and downscaled cruisers known from the days of the Old Republic, the Imperial-class was a huge warship, but in the Imperial Navy, it was one of the Empire's mid-sized mainline warships, like its predecessor had been for the Republic. All known variants were 1,600 meters long (one mile). The Imperial-class was produced in large numbers and was the premier warship class of the Galactic Empire. A single Imperial-class vessel cost the Empire more than twenty times the cost of a EF76 Nebulon-B escort frigate, which was the equivalent of several star systems' annual economic output. The Imperial I-class belonged to the Star Destroyer family of warship, exemplified by its dagger/arrowhead design. It later became a mainstay of the Imperial Navy and was also fielded to a lesser degree by the Empire's successor-states.

It was at the time one of the largest warship classes in the Republic Navy.

The Imperator-class was originally used by the Republic Navy toward the end of the Clone Wars, and served alongside the Tector-class in a few task forces during the conflict. The Imperial-class Star Destroyers, along with Imperial stormtroopers, represented the might of the Imperial Military throughout the galaxy during the reign of the Galactic Empire. The Imperial I-class Star Destroyer, also known as the Imperial I-class Destroyer and Imperator-class Star Destroyer, was an iconic class of warships designed by Lira Wessex and built by Kuat Drive Yards.
