Bulwark Mark I The Bulwark Mark I , also known as the " Bulwark " - class battleship , was a kilometer - long warship , manufactured by the Techno Union in the years leading up to the Clone Wars , that was heavily armored and equipped with turbolasers and ion cannons . During the galactic conflict , several such vessels made up the Separatist Bulwark Fleet , which terrorized Republic forces in the Core Worlds before its destruction . One Bulwark Mark I later served with the New Republic ' s Rapid Response Task Force during the Battle of Mindor . Characteristics . The Bulwark Mark I was a thousand - meter - long warship developed and produced by the Techno Union at the Foerost Shipyards prior to the outbreak of the Clone Wars . The warship was armed with turbolasers and ion cannons , and possessed armor that enabled it to ram smaller starships while taking no damage . The warship was classified as a Star Destroyer under the Anaxes War College System . History . Developed by the Techno Union before the Clone Wars , the Bulwark Mark I was produced by Union engineers at the shipyards above the Core World of Foerost . When war broke out between the Galactic Republic and the Confederacy of Independent Systems — of which the Techno Union was a member — in 22 BBY , Republic forces initiated a blockade of Foerost , hoping the planet ' s shipyards would suffer from the lack of Separatist supplies . However , in 20 BBY , almost two years into the conflict , the Sullustan Dua Ningo assumed command of the Bulwark Fleet , an armada of Bulwark Mark I warships , and broke the Republic ' s blockade . With Ningo commanding from the " Unrepentant " , the Bulwark Fleet defeated everything that stood in its way during a campaign throughout Coruscant ' s Sector Zero before being defeated by the Republic Victory Fleet at the Battle of Anaxes . A successor class , the Bulwark Mark II , was also produced for the Confederacy . Following the Clone Wars , TransGalMeg Industries used the Mark I design as inspiration for the Bulwark Mark III battlecruiser , which was utilized by the Rebel Alliance during the Galactic Civil War . A retrofitted Bulwark Mark I served with the New Republic ' s Rapid Response Task Force and participated in the Battle of Mindor in 5 ABY . The modified battleship possessed a Class 0 . 6 hyperdrive , additional shielding , space for at least three starfighter squadrons , and several " Jadthu " - class landing ships secured to its hull . Behind the scenes . The Bulwark Mark I was introduced in " The New Essential Chronology " , a 2005 reference book authored by Daniel Wallace . The warship was included as a nod to the " Bulwark " - class battle cruiser from the 1998 video game " " . In 2008 , the Bulwark Mark I received a mention in " The Complete Star Wars Encyclopedia " in the entry for the planet Foerost , as well as an appearance in Matthew Stover ' s novel " Luke Skywalker and the Shadows of Mindor " , in which it was referred to as a " " Bulwark " - class battleship . " In 2012 , " The Essential Guide to Warfare " referenced the Bulwark Mark I , in addition to introducing the Mark II and identifying the battle cruiser from " Rebellion " as the Bulwark Mark III .