Luna and the girls had already completed all their bureaucratic paperwork. The documents were sealed, signed, and technically legitimized by royal authority. Now they had to achieve something much more difficult:
Generate real achievements and demonstrate competence in the field.
Specifically, Luna had to support the Starweaver side in the northern perimeter of the defensive area. This way she could function as a representative leader in her territory, and no one could allege that the sector had been abandoned by her family faction. Additionally, if her uncles' opposing faction wasn't present on their side, she would have certain legal priority in any subsequent "Starweaver" claims.
Of course, for that to work, the important thing was that she didn't let the crisis take many casualties under her command and that she could effectively coordinate the soldiers.
