Eldar raid on Scallius

With the loss of Aganthus and Cathasaea the Eldar had been forced from their last planetary holdings within the Perseus Deeps in early 010M42, but they were not entirely without presence, and they still had business in the Aleph sector, particularly in hiding their three planets in the Shadow Worlds from the unwelcome view of would be colonisers.

The Shadow Worlds had been relatively peaceful for much of 010M42. The Imperial crusade in the Deeps and the continued campaigns on Tarsis and Betor had meant a distict lack of focus on the Alphe and Shadow Worlds theatres of war. The Orks meanwhile appeared to be spending much of their time fighting among themselves, with both Waagh Snazteef and Waagh Nazghat apparently having both collapsed towards the end of 009M42.

The Eldar remained too weak to restart an all out war in the Shadow Worlds region, so instead used their webway portals to launch a punitive and successful raid against units of the Covenant of Damnation, based on Scallius. The Chaos forces were taken by surprise and the Eldar were able to obtain several important artefacts and deal the traitor units a heavy blow.

Exactly why the Eldar chose 11.010M42 to conduct this raid, and how it would ultimately help their cause remained unknown to outside observers, but the damage to the chaos forces certainly hindered their campaign against the Imperium.