About this Unit
**Office of Special Investigations (OSI) – Military History**
The United States Air Force Office of Special Investigations (OSI) was established on August 1, 1948, as a separate investigative agency modeled after the Federal Bureau of Investigation (FBI). Its primary mission is to conduct criminal investigations, counterintelligence, and specialized investigative activities to protect Air Force and Space Force personnel and resources. Over the decades, OSI has played a critical role in uncovering espionage, combating terrorism, and supporting contingency operations worldwide. Today, OSI operates globally, providing essential security and investigative support to ensure the integrity and readiness of the U.S. Air and Space Forces.
Historical Facts
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Origins in World War II: The Office of Special Investigations (OSI) was established in 1948, but its roots trace back to military security and counterintelligence operations developed during World War II.
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Modeled After the FBI: The OSI was modeled after the Federal Bureau of Investigation (FBI), adopting many of its investigative techniques and organizational structures to handle crimes and counterintelligence.
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First Female Special Agent: In 1971, OSI hired its first female special agent, breaking gender barriers within military investigative agencies.
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Global Presence: OSI operates in more than 200 locations worldwide, making it one of the most widely deployed U.S. military investigative agencies.
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High-Profile Espionage Cases: OSI has investigated and helped apprehend several high-profile spies, including John A. Walker, who provided classified information to the Soviet Union.
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Forensic Innovations: OSI was among the first military agencies to utilize forensic science and polygraph examinations in criminal and counterintelligence investigations.
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Involvement in Terrorism Cases: Since the 9/11 attacks, OSI has played a significant role in counterterrorism operations, both domestically and abroad.
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Cold War Operations: During the Cold War, OSI agents were instrumental in uncovering and preventing sabotage and espionage attempts against U.S. Air Force assets in Europe and Asia.
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Wartime Deployments: OSI agents have deployed to every major conflict since its inception, including Korea, Vietnam, the Gulf War, Iraq, and Afghanistan, providing security, investigations, and counterintelligence support.
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Joint Operations: OSI routinely works with other U.S. and allied intelligence and law enforcement agencies, including NCIS, Army CID, the FBI, and foreign counterparts, to combat global threats.
