Psychological warfare
A U.S. Army field manual released in January 2013 states that "Inform and Influence Activities" are critical for describing, directing, and leading military operations. Several Army Division leadership staff are assigned to “planning, integration and synchronization of designated information-related capabilities."
In September 2022, the DoD launched an audit of covert information warfare after social media companies identified a suspected U.S. military operation.

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References: 

Bibliography: 

External links: 
Movie: Psywar: The Real Battlefield is the Mind by Metanoia films

Paul Myron Anthony Linebarger. Psychological Warfare at Project Gutenberg
The history of psychological warfare
IWS Psychological Operations (PsyOps) / Influence Operations Archived 8 December 2010 at the Wayback Machine
"Pentagon psychological warfare operation", USA Today, 15 December 2005
"U.S. Adapts Cold-War Idea to Fight Terrorists", New York Times, 18 March 2008
US Army PSYOPS Info – Detailed information about the US Army Psychological Operation Soldiers
IWS — The Information Warfare Site Archived 8 December 2010 at the Wayback Machine
U.S. — PSYOP producing mid-eastern kids comic book
The Institute of Heraldry — Psychological Operations
Psychological warfare
The Nature of Psychological Warfare (CIA 1958) Original