"They found further subspace communication matching the signature of our search subject. From the moon Belsus in the Anoat system. The Confederacy is here in the force."
―Jedi Padawan Rini, telling Flynn Kybo that he found Grievous on Belsus.[src]
The system was taken under Separatist control during the Clone Wars, due to an attack led by GeneralGrievous. Grievous attacked Gentes, the Ugnaughthomeworld, eager to take the Ugnaughts as factory laborers. On Belsus, he demonstrated his power to a group of JediPadawans by destroying the population of an entire Ugnaught city. Soon after, a Jedi strike force attempted to assassinate Grievous. During their battle with him, the thermal core of a geothermal plant went critical. The resultant explosions threatened the stability of the moon's surface. Nevertheless, Grievous survived.
The three planets were abandoned sometime before the Galactic Civil War. Toxic waste infected Anoat and the terraformed waterworld Deyer, forcing the populations to move offworld.
In 2 ABY, Rebel lieutenantRisiev Credal was supervising a routine patrol through the Anoat system and suddenly jumped to hyperspace without a warning, effectively disappearing. This led many to believe that Credal was a traitor.[3]
Sometime prior to the Battle of Endor, the elite Scythe Squadron, a squadron of TIE/LN starfighters in the Galactic Empire, were stationed in the system. Several squadron TIEs were upgraded with more powerful cannons to be able to destroy the system's asteroids.