Special Investigations, which were "to provide a competent, centrally directed special investigations service to all Air Force activities", including the investigation of such major offenses as "fraud and/or conspiracy, arson, black-market operations, bribery, burglary, embezzlement, forgery, larceny, perjury, robbery, smuggling, and similar offenses ... and other major violations of the Articles of War, Federal Statute, and/or other pertinent directives". A new Chief of Staff of the United States Air Force Hoyt Vandenberg signed the General Order №29 of 15 July 1948 that empowered the Office of Special Investigations to carry out the counterintelligence activity including the detection of espionage, sabotage, treason, sedition, subversion, disloyalty, and disaffection. Also it was specifically stated that OSI would be responsible for all investigations formerly performed by the USAF Counterintelligence Corps. 1 August 1948 is considered the operational date of the Office of Special Investigations. The OSI was the only military investigative service not to be designated a law enforcement agency when it was created in 1948. It was not until 1976 when an OSI reservist noted the discrepancy and called it to the attention of command, and OSI quickly sought and received official recognition and designation as an official law enforcement agency. Organization In addition to the OSI headquarters at Quantico, VA, OSI has seven field investigations regions aligned with Air Force major commands and the Unified combatant commands Region 1 with Air Force Materiel Command, Air Force Special Operations Command, Air Force Reserve Command Region 2 with Air Combat Command, United States Central Command, United States Southern Command, United States Strategic Command, 12th Air Force, 16th Air Force Region 3 with Air Mobility Command, United States Transportation Command, United States Special Operations Command, United States Central Command, Air Force District of Washington, Pentagon Force Protection Agency Region 4 with Air Education and Training Command, 2nd Air Force, 19th Air Force, Air University Region 5 with United States Air Forces in Europe – Air Forces Africa, United States Africa Command, United States European Command, 3rd Air Force Region 6 with Pacific Air Forces, United States Indo-Pacific Command, Special Operations Command Pacific, 5th Air Force, 7th Air Force, 11th Air Force Region 8 with United States Space Force, Air Force Global Strike Command, United States Northern Command, 8th Air Force, 14th Air Force, 20th Air Force, United States Air Force Academy In addition, OSI has several specialized investigative, training, or supporting units: Office of Special