Office of Naval Intelligence
ONI, the UNSC intelligence branch behind the Spartan programs.
The Office of Naval Intelligence (ONI) is the intelligence service of the UNSC in the Halo series. ONI created the SPARTAN-II project, an elite group of enhanced supersoldiers meant to suppress colonial rebellions.
Lore & Background
ONI agents and installations recur across the series: in Halo: Reach Noble Team defends Sword Base, an ONI installation, from a Covenant assault; in Halo 3: ODST an ONI agent is in charge of the squad's operation; and the comic Halo: Blood Line follows a black-ops Spartan team assigned to ONI. In Halo: Ghosts of Onyx ONI stages Kurt-051's death so he can run SPARTAN-III training.
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Elsewhere in Halo
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