DOD Directive S3600.1

Citation
U.S. Department of Defense, DOD Directive S3600.1: Information Operations (Dec. 1996) (not available online).

Overview
This document opened a new phase in information warfare doctrine. This document, classified secret, was afforded much greater dissemination than the top secret version (DOD Directive TS3600.1) released four years earlier. It captured the thinking on information warfare that developed during the ensuing years, to include, information assurance, information operations, and infrastructure protection, concepts not addressed in the earlier version of the directive.

Source

 * Information Operations: Is the Army Doing Enough?, at 8.