Office of Imperial Intelligence (Earth-2042)

"Kat, you read his file? Only the parts that weren't covered in black ink."

- Emile-A239 and Kat-B320 reading an ONI file

The Office of Imperial Intelligence (OII) is the intelligence service of the Imperial Military and previously the Systems Alliance Armed Forces as the Office of Naval Intelligence (ONI). Overtly, the agency was merely the information gathering and analysis division of the Imperial Armed Forces and the Systems Alliance before it. In reality, the operations of the Office of Imperial Intelligence were far broader than simple intelligence gathering.

OII has become known for their preeminent role in the acquisition and leveraging of military intelligence. The agency was widely known for using subterfuge, deception, and manipulation in defense of the Galactic Empire and the Emperor  in order to accomplish its goals. Additionally, the Office of Imperial Intelligence employs numerous special projects, such as the SPARTAN programs, Project: MJOLNIR, and the investigation of Forerunner sites—the most notable of which was Trevelyan.

Source

 * https://www.halopedia.org/Office_of_Naval_Intelligence