A covert operation or undercover operation is a military or police operation involving a covert agent or troops acting under an assumed cover to conceal the identity of the party responsible. Some of the covert operations are also clandestine operations which are performed in secret and meant to stay secret, though many are not.
Covert operations aim to fulfill their mission objectives without anyone knowing who sponsored or carried out the operation. The Department of Defense Dictionary of Military and Associated Terms (Joint Publication JP1-02), defines "covert operation" as "an operation that is so planned and executed as to conceal the identity of or permit plausible denial by the sponsor. A covert operation differs from a clandestine operation in that emphasis is placed on concealment of a sponsor rather than on concealment of the operation".
Covert operations are employed in situations where openly operating against a target would be disadvantageous. Operations may be directed at or conducted with allies and friends to secure their support for controversial components of foreign policy throughout the world. Covert operations may include sabotage, assassinations, support for coups d'état, or support for subversion. Tactics include the use of a false flag or front group. The activity of organizations engaged in covert operations is in some instances similar to or overlaps with, the activity of front organizations. While covert organizations are generally of a more official military or paramilitary nature, like the DVS German Air Transport School in the Nazi era, the line between both becomes muddled in the case of front organizations engaged in terrorist activities and organized crime.
Under U.S. law, the Central Intelligence Agency (CIA) must lead covert operations unless the president finds that another agency should do so and properly informs Congress. Normally, the CIA is the U.S. government agency legally allowed to carry out covert action. The CIA's authority to conduct covert action comes from the National Security Act of 1947.
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