The Imperial-I Class Star Destroyer, often abbreviated ISD I, is a formidable capital ship and one of the primary capital ships of the Imperial Remnant and Pentastar Alignment. It carries an armament of 60/6 Turbolasers, 6/2 Dual Heavy Turbolasers, 2/2 Quad Heavy Turbolasers, 60/6 Ion Cannons, and a Tractor Beam.
The ISD I began production during the end of the Clone Wars. As such, it soon became the mainstay of the newly formed Galactic Empire. These fearsome capital ships soon symbolized the Empire's naval might, even as Stormtroopers and AT-AT's would soon do in the military.
Upon the Emperor's death at the Battle of Endor, the Empire fractured. Many of the remaining ISD I's were either captured by the New Republic or destroyed by the infighting between breakaway Imperial Warlords. The ISD I remained in one form of service or another, whether commandeered ships by the New Republic or ships still commanded by the Imperial Remnant, throughout the resulting Imperial Civil War. As a testament to the class's competence in warfare, Grand Admiral Gilad Pellaeon commanded the ISD I Right to Rule during the Yuuzhan Vong War, some forty-eight years after the class had been commissioned.
The ISD I is the lowest tier capital ship available to the Imperial Remnant and Pentastar Alignment, costing 5900 credits. It's a competent ship, more than a match for anything up to an MC80B. However, as the eras progress, it soon becomes outclassed by more powerful New Class designs, like the Nebula-class Star Destroyer or the MC90. Also, for an extra 400 credits, the much more potent ISD II can be built. This leads to most players only using the ISD I's received at the outset of the GC and slowly phasing them out for ISD II's.