The Tyranids and the Orks were both great enemies of the Imperium of Man, constantly threatening its security.
If the Imperium could muster all its strength, it would have nothing to fear from them. After all, the Imperium of Man had vast territories and an immense population.
But... the Imperium had its own difficulties. It was simply too vast. Wars raged everywhere, and every region needed troops stationed there.
When faced with an invasion by a Tyranid fleet, the Imperium of Man had once chosen to divert the threat elsewhere, using Gitz's psychic beacon to lure it into the Ork Sector.
The aim was to make these two great enemies of humanity wear each other down. Ideally, they would annihilate each other-a true blessing from the God-Emperor.
The plan looked good on paper, and its execution was a resounding success. The Tyranid hive fleet had indeed pushed deep into the Ork systems and fought a war of unprecedented scale against the Orks on Octarius. Barring any surprises... everything seemed to be going very smoothly...
Yet the unexpected arrived right on cue. A war that would have been devastatingly brutal for humanity had weakened neither the Tyranids nor the Orks. Instead, it had made them stronger.
The Tyranids had acquired vast quantities of biomass, swelling their numbers. The war had also united the Orks more closely. Not only had their numbers increased, but every individual Ork had grown stronger.
The Imperium of Man's self-assured scheme had made both its enemies stronger and more terrifying.
The entire Ork Sector was like a bomb with its fuse lit, ready at any moment to blow apart the Imperium's entire eastern defensive line.
To avoid being torn open by that bomb, the Imperium of Man had begun trying to repair the damage, strengthening the defenses