Craftworld Iyanden vs Necrons.
Necron activity on Khemet III is increasing. Eldar patrol forces have engaged necrons on at least two occasions while the Imperial forces have also reported firefights with the alien race. Necron attacks appear to be increasing and there have been whispered rumours that the Imperium may seek out an alliance to defeat the machines. But for now the slow advance of the Necrons across the planets surface has the Warmaster worried. Fighting on multiple fronts against an unexpected foe was not on the cards when the crusade started.