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Intelligence Support Activity

The Intelligence Support Activity (ISA), also known at various times as Mission Support Activity (MSA), Office of Military Support (OMS), Field Operations Group (FOG), Studies and Analysis Activity (SAA), Tactical Concept Activity, Tactical Support Team, Tactical Coordination Detachment, and also nicknamed "The Activity" and the "Army of Northern Virginia", is a United States Army special operations unit which serves as the field military intelligence gathering component of Joint Special Operations Command (JSOC).

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