The actions of Kilo-Five were instrumental in worsening the Sangheili civil war.

BRANCH: Office of Naval Intelligence
INCEPTION: January 2553




Kilo-Five was an ONI squad tasked with worsening the Sangheili civil war and other missions immediately following the end of the Human-Covenant War. They were headed by Serin Osman, who later became the head of ONI. Kilo-Five was disbanded some time before 2557.




Following the end of the Human-Covenant War, the Office of Naval Intelligence was concerned of the sudden power vacuum in the galaxy once the San’shyuum disappeared. Kilo-Five was created to act as a top secret team of agents, tasked with bolstering the weaker factions in the Sangheili civil war and both lengthening and worsening the conflict. During this mission, the team was also confronted with the realities of the Spartan-II program, both during the capture of Doctor Catherine Halsey, and the discovery of Staffan Sentzke, the father of Naomi-010, a Spartan-II and member of Kilo-Five. Their interactions with Sentzke resulted in the Skirmish on Pious Inquisitor, a battle for control of the Covenant warship that resulted in the destruction of the ship.