As part of the agreement made with the Great Oni Emperor, the Germanic Star-Empire dispatched a second fleet to aid in the war with the Lutharian Ascendency. However, what was initially supposed to be a rather quick military conflict with a peer. Had turned into a war of attrition.
Not because the Germanic Navy was incapable of breaking through the enemy's defenses. But because the Great Oni Empire was entering a state of civil war. All across their empire, worlds began to burn in riots, which were put down violently by the local governments.
This created a need for the rebels to get their hands on some weapons, and who did they turn to for this matter? Well, certainly not the Germanic Star-Empire. After all, they were allied with the Great Oni Empire and would never support a violent insurrection.