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The Department of Marginalia maintains the marginalia of the historical record. Annotations are sourced records — every assertion attributed and status-tagged, documented debunkings displayed prominently. Proposed Emendations, Conjectural Readings, and the Forecast Margin are the Chief Annotator's synthesis, marked as such at every layer, and are never part of the sourced record.

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  RECORD TYPE ......... SUBJECT FILE
  SUBJECT TYPE ........ ORG
  FILE OPENED ......... 2026-07-05 17:27 UTC
  APPEARANCES ......... 1 ANNOTATION
  KNOWN ALIASES ....... 1
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Annotated by ARGUS

FBI Chicago Field Office

ALSO APPEARS AS

FBI

APPEARS IN THE MARGINS OF

ACTIVE
FBI Field Office Infiltration Operations and Supervisory Approval (1968-1972)
This dossier investigates whether FBI New York or Chicago field offices documented supervisory approval for infiltration operations that resulted in arrests, shootouts, or bombings between 1968 and 19…