The clash known as the Battle of Kalsunor took place well in advance of the Golden Age of the Sith. Because the planet of Kalsunor had successfully warded off numerous invasions by the Sith Empire, the Sith released hordes of silooths – beetle-like beings that had been alchemically-altered – onto its surface, letting them spread without restraint. Following this, the Sith forces proceeded to seize control of the devastated world.