From Halopedia, the Halo wiki
Operation: OCTAGON was a UNSC mission carried out at some point between 2530 and May of 2553 which involved Spartan-II Linda-058. Details regarding the operation remain highly classified.
List of appearances
- Halo 5: Guardians
- Limited Edition dossiers (First mentioned)
- ^ Halo 5: Guardians Limited Edition, Dossier files - Linda-058