…Of course, our force was not solely concerned with forcing back the forces of the Despoiler. With the attention of the Imperium focused on the Black Crusade slaughtering it's way towards Terra, many of the other abominations took it into their heads (or closest equivalent) to try and snatch worlds away from the distracted High Lords, or simply attack to satisfy their lust for war.
There was, of course, the inevitable Ork Waargh! around the edges of the Arch Enemy's advance, quite probably paid off by Abaddon with slaves and guns. The pirate raid by the Chaos-tainted Eldar on the colony on Thackashi Prime, and their subsequent ambush by the Eagles of Justice Astartes Chapter, re-arming and repairing after an assault on the flanks of the Chaos assault, no doubt left the few xenos survivors with many nightmares, in which the phase 'Justice has come for you!' no doubt features heavily.
These incidents are, of course, well documented elsewhere, and for the most part need not concern us. There were several incidents, however, where the temporary re-direction of an Astartes company or deployment of a Imperial Guard regiment were not enough to deal with these distractions.
At such times, our task force found itself diverted away from the front, to bring our sheer focus of power to bear on one or another distraction. Several times, it was the foul Green-skins that we had been brought to confound. But a few of these missions were focused against abominations far worse then any Ork warboss could ever hope to employ…
From The Weapons of the Past; An Account of the Final Crusade and the Role of the Evangelion by Inquisitor Lord Thorne, written 027 M42