Under the Dark Angels' surprise assault, this traitor legion fleet was quickly annihilated.
After rearming, the mighty Dark Angels were practically slaughtering their former traitorous kin. They silently entered the warships, then eliminated the traitors one by one in the darkness.
Even the mortal crewmen who had turned traitor were all put to death beneath the Dark Angels' blades.
To the First Legion, betrayal was betrayal. No sacrifice was too great to accept, and no betrayal too minor to overlook. These mortals had not chosen to die in loyal service to the Imperium; that was betrayal.
"Purge complete. Extracting the warship database."
"Database extraction complete. All units withdraw."
With the data recovered from the warship's Cogitator server, along with several sufficiently valuable prisoners, the Dark Angels' boarding parties returned to their flagship aboard their boarding craft.
As for the boarding torpedoes, lacking any effective means of returning, they would have to await later recovery. Of course, for the well-resourced Dark Angels, using them as disposable equipment was no great concern.
The New Caliban could produce these relatively uncomplicated war machines.
Once victory had been decided in the naval battle in space, the situation on the surface was no longer so important.
If necessary, Lion only needed to issue an Exterminatus order or conduct orbital bombardment to utterly erase this splinter force of the Tiger Eyes Titan Legion.
Sanguinius watched him warily, afraid that the Lion's old habits would flare up again.
"Don't look at me like that, my brother. I only did that before for the sake of efficiency and time. We didn't have that much time to waste if we were to return to aid Terra. You don't really think I'm some Exterminatus maniac, do you?"
The Lion tried to explain himself, but Sanguinius clearly did not believe him.