What was Operation Mongoose?

Operation Mongoose was a U.S. covert campaign to destabilize and overthrow Fidel Castro's government.

Summary

Operation Mongoose was a formally authorized U.S. covert-action program aimed at destabilizing and overthrowing Castro’s government. Declassified memoranda show a structured campaign involving intelligence collection, political and economic pressure, psychological operations, exile assistance, and contingency planning, while also documenting limits intended to avoid immediate U.S. military intervention.

• Strategic aimWashington treated Castro’s government as a major Cold War threat and sought to weaken or remove it.
• Operational designThe campaign was broader than a single assassination or sabotage scheme: it involved coordinated intelligence, political, economic, psychological, and clandestine activity.
• Historical significanceThe campaign helps explain Cuban and Soviet fears of U.S. intervention before and during the missile crisis.

• Declassified records describe Mongoose as a coordinated project to help Cuba overthrow the communist regime, led operationally by Edward Lansdale.nsarchive
• The approved plan authorized intelligence collection and development of clandestine resistance cadres while stopping short of actions reasonably calculated to provoke revolt or U.S. intervention.history
• Phase I included efforts to isolate Cuba diplomatically, apply economic pressure, conduct psychological operations, and train or support Cuban exiles.nsarchive