As Tia predicted, it was a mere three years of repeated assaults by the Naraku on the Germanic border before they ultimately relented. Choosing to withdraw what remained of their fleets sent to that sector of the Milky Way and instead divert them to the other and weaker powers.
The bulk of the Naraku who had previously fought three hard years to penetrate into Germanic space, and utterly failed to do so, found themselves being sent to the Cabal and Theocracy theaters. They were after all the weaker members of the five major Galactic Powers, and their losses naturally reflected this.