Event ยท M41
Orpheus War
The Orpheus War was a forty-first-millennium conflict in the Orpheus Sector in which Ultramarines forces from Macragge opposed Necron dynasties. The sector lies within the sphere of Ultramar, the realm governed from Macragge, and the war is recorded as arising when dormant Necron holdings within it stirred and began to threaten Imperial worlds and shipping. Its causes are attributed to the general reawakening of Necron tomb complexes in the late Imperial era, rather than to a single identified event; accounts differ on the exact date and on which dynasties took part. The principal Imperial participants were the Ultramarines, the Adeptus Astartes Chapter whose fortress-monastery stands on Macragge, supported by the Imperial Army and Planetary Defence Forces of the surrounding systems. Their opponents were Necron warriors and the constructs that serve them, whose strategy of rising from tomb worlds and withdrawing again made the campaign a series of local engagements rather than one decisive front. Its place on the Orrery graph is therefore twofold: on the map, it is anchored to the Orpheus Sector, with Macragge as the host location and command centre; on the timeline, it belongs to the forty-first millennium, alongside the other threats that pressed on Ultramar in that era, including the Tyranid invasion that reached Macragge in 745.M41. The war is recorded as ending with the Necron presence in the sector contained rather than eliminated. That outcome fits the wider pattern of Imperial encounters with the Necrons, in which tomb worlds are cleansed, sealed or abandoned without their builders being destroyed. Little further detail is firmly attested, and this entry avoids supplying names, dates or battles that the established record does not support. Readers seeking the Chapter that bore the burden of the war should turn to the Ultramarines and to Macragge, the world from which its forces were mustered.
See where Orpheus War occurred on the galactic map in the 41st Millennium.