The '''Coronis Campaign''' began when the massive [[Hive Fleet]] [[Scarabus]], invaded the [[Sector]] of the [[Imperium]] world of [[Coronis]]. World after world fell before the ravenous swarm, as the [[Imperium]]'s forces sent to stop the [[Tyranids]] were easily swept away. Soon Coronis lay in Scarabus' path and several [[Regiments]] of the [[Imperial Guard]] were sent to quickly dig into the world to repel the Hive Fleet. As the Tyranids began to darken Coronis' sky however, a vision of the [[Emperor]] was received that revealed a critical weakness in Scarabus' implacable advance. The Imperium's forces in the Sector were filled with new hope, as the vision showed the time to defeat the vile Tyranid scourge was nigh.{{Fn|1}}