The United States operates one of the most secretive and capable paramilitary forces in the world, often functioning beyond public scrutiny and outside standard military command structures. Known as the Special Activities Center (SAC), previously called the Special Activities Division (SAD), this elite CIA unit specializes in covert operations, direct action, and unconventional warfare. These missions are typically designed to maintain plausible deniability for the U.S. government.
Frequently referred to as America’s “secret army,” the SAC’s Special Operations Group (SOG) draws top talent from U.S. special operations communities. While units like Delta Force or SEAL Team 6 often capture media attention, SAC operators frequently operate in the shadows, laying groundwork or executing high-risk tasks that conventional forces cannot.
Historical Roots and Evolution
SAC’s origins date back to the Office of Strategic Services (OSS) during World War II, the forerunner to the modern CIA. Following the CIA’s establishment in 1947, paramilitary capabilities became essential during the Cold War. The unit gained extensive experience in Korea, Vietnam, and Laos, where it supported covert programs including Air America operations.
In later decades, SAC maintained a lower profile but remained active in Central America, Africa, and the Middle East. The September 11, 2001 terrorist attacks triggered a major expansion. SAC/SOG teams were among the first U.S. personnel in Afghanistan, where they partnered with Northern Alliance fighters, directed airstrikes, and pursued al-Qaeda leadership. They played similar critical roles in the early stages of the Iraq War.
Organizational Structure
SAC is divided into specialized branches to handle diverse missions:
- Ground Branch: The core paramilitary element, staffed by veterans from Delta Force, Navy SEALs, Green Berets, and Army Rangers. Operators conduct direct action raids, sabotage, hostage rescue, counterterrorism, and foreign force training. Teams are deliberately small, often six or fewer members, enabling high independence in hostile environments.
- Air Branch: Provides covert aviation support, including insertions, extractions, and logistics, historically through proprietary airlines and front companies.
- Maritime Branch: Specializes in water-based operations.
- Political Action Group (PAG): Focuses on non-kinetic efforts such as covert influence operations and psychological warfare.
Paramilitary officers undergo rigorous additional training beyond their military backgrounds, mastering languages, tradecraft, advanced weapons, demolitions, and survival skills.
Key Operations and Missions
SAC has participated in numerous sensitive operations:
- Post-9/11 efforts to capture or eliminate high-value al-Qaeda targets, including figures like Khalid Sheikh Mohammed and Abu Zubaydah.
- Pre-invasion groundwork in Iraq alongside Kurdish and Shiite groups.
- Support for proxy programs, such as Timber Sycamore in Syria.
- Clandestine evacuations and insertions in conflict zones ranging from Somalia and Liberia to the chaotic withdrawal from Kabul.
- Historical actions including the Bay of Pigs invasion, support for mujahideen fighters against the Soviets in Afghanistan, and various Cold War interventions.
Many operations follow a “zero footprint” approach, minimizing visible U.S. involvement.
Recruitment, Training, and Secrecy
Candidates are typically seasoned special operations veterans with multiple combat tours. The exact size of SAC remains classified but is estimated in the low hundreds of core operators — significantly smaller than Pentagon special operations commands. This compact size enhances agility and secrecy.
The emphasis on deniability offers strategic flexibility but raises ongoing questions about congressional oversight, accountability, and legal boundaries.
Impact and Ongoing Role
Supporters view SAC as a vital “third option” between diplomacy and large-scale military conflict, allowing rapid responses with reduced political exposure. Critics highlight risks of unintended consequences, civilian impacts, and limited transparency.
As detailed in books such as Annie Jacobsen’s Surprise, Kill, Vanish and Mark Mazzetti’s The Way of the Knife, the unit has delivered significant successes alongside complex ethical challenges.
In an era of evolving threats — from persistent terrorism to strategic competition with major powers — the CIA’s hidden special forces continue to serve as a quiet but essential instrument of American national security. Operating in the world’s most dangerous and inaccessible areas, SAC embodies the intelligence community’s enduring capacity for decisive action where visibility must remain minimal.
Their operations represent one of the least publicized aspects of U.S. defense and intelligence history — a secrecy that remains their most powerful asset.
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