The shipyard assault was an attack by the Confederacy of Independent Systems on Fondor, more specifically, Fondor Shipyards, where a Star Destroyer of an unknown class was being constructed, known as the Xerxes, in 22 BBY. The Confederate Navy amounted an attack as soon as possible, after Separatist Intelligence found out about the Galactic Republic's plan to built a large warship with cloaking devise to use as a flagship. In reality, Supreme Chancellor Palpatine was using it as an excuse to test several technologies for the future Executor-class Super Star Destroyer.