Psychological Operations: Planned operations to convey selected information and indicators to foreign audiences to influence their emotions, motives, objective reasoning, and ultimately the behavior of foreign governments, organizations, groups, and individuals. The purpose of psychological operations is to induce or reinforce foreign attitudes and behavior favorable to the originator’s objectives. Also called PSYOP. See also consolidation psychological operations; overt peacetime psychological operations programs; perception management. (Source: U.S. Department of Defense)
Somehow – I don’t think that these operations are limited to foreign countries . . .
This documentary is entitled Psywar.