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History of 66 CIC

The 66th Counter Intelligence Corps (CIC) was a U.S. Army intelligence unit active during and after World War II. Established as part of the larger CIC organization, the 66th CIC Detachment supported the 66th Infantry Division, focusing on counterespionage, security screening, and protection against sabotage in the European Theater. Following the war, the unit participated in occupation duties in Germany, conducting investigations, vetting German personnel, and monitoring for subversive activities. The 66th CIC’s efforts contributed significantly to the security and intelligence operations of U.S. forces during a critical period in European history.

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ABOUT 66 CIC

  • Origins in World War II: The 66th Counter Intelligence Corps (66 CIC) was formed during World War II as part of the U.S. Army’s efforts to counter espionage, sabotage, and subversion in Europe.
  • Assigned to the 66th Infantry Division: The 66 CIC operated initially in support of the 66th Infantry Division, which was primarily active in the European Theater of Operations.
  • Brest and the Atlantic Ports: The unit played a significant role in investigating and securing the French port city of Brest after its liberation, rooting out German spies and collaborators.
  • Postwar Operations in Germany: After WWII, the 66 CIC participated in occupation duties in Germany, conducting background checks and vetting German officials for potential Nazi affiliations.
  • Operation Paperclip: Members of the 66 CIC were involved in Operation Paperclip, screening German scientists before their transfer to the United States.
  • Transition to Cold War Intelligence: As the Cold War began, the 66 CIC shifted focus to counter-Soviet operations, monitoring communist activities in occupied Europe.
  • Integration into Army Intelligence: The 66 CIC was eventually merged into what became the U.S. Army Intelligence Agency, forming a key part of the modern Military Intelligence Corps.
  • Notable Personnel: Several 66 CIC veterans went on to serve in the early Central Intelligence Agency (CIA), bringing their expertise in counterintelligence and security.
  • Human Intelligence (HUMINT) Pioneers: The 66 CIC developed many of the Army’s early HUMINT collection and counterintelligence techniques that are still in use today.
  • Decorations and Commendations: The unit and its members received multiple awards for their clandestine and hazardous work, contributing greatly to Allied security and postwar stability in Europe.

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