War for Frubia Prime

The War for Frubia Prime was a xenocidal castigation campaign conducted by the unforgiving Blades of the Lion Chapter against the vile Necrons of the Zarkharth Dynasty, which had invaded the Imperial world of Frubia Prime. Though they sustained severe losses trying to rid the planet of the Necrons' presence, they finally relented and withdrew, eventually subjecting the world to Exterminatus, so the doomed world would not fall into the Necrons' hands.

History
Frubia Prime, located within the Segmentum Obscurus was a campaign to cleanse the planet of Necrons known as the Zarkharth Dynasty. The Blades of the Lion received a distress signal from the Forge World of Frubia Prime. After a millennium long slumber, the reawakening of Necrons was eradicating the populists of the Forge World. The Blades sustained heavy losses and the lost of the planet to these vial xenos. After four long years of fighting, the Blades of the Lions had little choice but to enact Exterminatus. Cleansing the planet thoroughly and painfully of the Necrons.