About this Unit
Naval Security Group Activity (NSGA) Medina was a United States Navy signals intelligence (SIGINT) unit located at the Medina Annex of Lackland Air Force Base in San Antonio, Texas. Established in the 1960s, NSGA Medina played a vital role in cryptologic training and operations, supporting national security objectives during the Cold War and beyond. The unit specialized in electronic warfare, communications interception, and cryptologic analysis, training thousands of Navy personnel in these critical skills. NSGA Medina was decommissioned in September 2005 as part of a larger realignment and consolidation of Navy cryptologic activities.
Historical Facts
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Origins: Naval Security Group Activity (NSGA) Medina was established in the early 1960s to support the growing need for secure communications and signals intelligence (SIGINT) during the Cold War.
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Location: NSGA Medina was located on the Medina Annex, part of Lackland Air Force Base in San Antonio, Texas.
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Mission: Its primary role was to provide cryptologic support, conduct electronic surveillance, and ensure secure communications for the U.S. Navy and joint operations.
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Training Hub: Medina was renowned for providing specialized cryptologic training to Navy personnel, including linguists, cryptologists, and electronic warfare specialists.
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Cold War Operations: During the Cold War, personnel from NSGA Medina were deployed worldwide, intercepting and analyzing foreign communications as part of the broader U.S. intelligence effort.
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Women in Service: The unit was among the first Navy cryptologic commands to fully integrate women into operational and technical roles.
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Base Realignment: In 2005, as part of the Base Realignment and Closure (BRAC) process, NSGA Medina was disestablished, and its missions were consolidated under the Navy Information Operations Command (NIOC) Texas.
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Joint Operations: NSGA Medina worked closely with other military branches and agencies, including the NSA and Air Force units stationed at Lackland AFB.
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Legacy: Many of its alumni went on to serve in key positions throughout the intelligence community, contributing to significant U.S. cryptologic successes.
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Motto and Culture: The unit fostered a tight-knit community, with a motto reflecting their secretive but vital mission: “In God We Trust, All Others We Monitor.”