Crafted and manufactured completely within the Foerost ship-building facilities by Separatist engineers who were under siege, the Bulwark Fleet was under the command of Dua Ningo and primarily comprised of the newly-developed and strategically significant Bulwark Mark I battlecruisers. This fleet served the purpose of ending the Siege of Foerost and advancing the CIS's military campaign. It was only the early deployment of the Victory Fleet of Victory-class Star Destroyers that succeeded in halting the fleet's considerable drive.