The Osean Intelligence Agency (OIA), also known as the Central Intelligence Agency, is an Osean intelligence bureau.
During the Belkan War, Amy Pitt was tasked with infiltrating the Belkan Air Force and continued operating after the coup d'état. In 1999, she was placed under Level 1 surveillance after a Belkan officer revealed she was a double agent. The same year, the OIA's Advanced Weapons Analysis division observed sand carriers below Okchabursk. They suspected that a new Super Scinfaxi-class submarine was in construction while observing the delivery of steel and weapons to the city. The division's report on the submarine was completed on March 27, 2000.
In 2016, analyst David North tracked the movements of the Alicorn submarine until after its transfer to the Erusean Navy's reserve fleet in 2018. On September 4, 2019, he contacted the Long Range Strategic Strike Group and took part in the briefing for Operation Sighthound.
- The organization is likely the Osean counterpart of the real-life Central Intelligence Agency, the intelligence service of the United States of America. The agency was even referred to as the C.I.A in Ace Combat Zero: The Belkan Wars assault records. It's change in Ace Combat 7 is presumably a retcon.