The Inexpugnable-class tactical command ship was a large warship class used by the Coalition. Designed and manufactured by Rendili Hyperworks and Rendili/Vanjervalis Drive Yards, the Inexpugnable-class was used as a flagship and command ship. Often described as a mobile space station, at 3,100 meters in diameter it was one of the largest Republic spacecraft of its time. Warships of the class saw combat at a number of battles in the First War. The Inexpugnable-class was renowned for its ability to lead massive Horde fleets, employing advanced command techniques such as the Vanjervalis Chain to command up to sixty-four Hammerhead-class cruisers simultaneously.