In the fictional Star Wars galaxy, the Imperial Navy, or more properly, the Imperial Starfleet, is the senior military arm of the Galactic Empire. At its peak it fielded millions of warships and fulfilled the Emperor's will throughout the galaxy.
The most visible symbol of the Imperial Starfleet was the Star Destroyer. At least 25,000 Star Destroyers of the Imperator I and Imperator II classes were commissioned during Palpatine's 25-year reign.
The flagship of the Imperial Starfleet after the Battle of Yavin was the Star Dreadnought Executor. HIMS Executor was destroyed during the Battle of Endor, where the Emperor also perished. Subsequently, the Galactic Empire split up into warring factions and the Imperial Starfleet splintered along with it.
The Empire, and the Starfleet, was reunited under the leadership of Grand Admiral Thrawn some five years after the Battle of Endor. Thrawn's flagship was the Imperator-class Star Destroyer Chimaera. Approximately one year after Thrawn's defeat the Empire was again re-united, this time under a clone of the Emperor, who used the gargantuan Eclipse-class Star Dreadnought as his flagship.
The vast majority of personnel in the Imperial Navy is male, although a few females have joined up, such as Admiral Daala.
Most major capital ships during the height of the Empire were constructed by Kuat Drive Yards. Other ship manufacturers supplied the Imperial Starfleet with support ships such as Carrack-class frigates, Lancer-class frigates, Strike-class frigates and escort carriers.