Psychological Operations (or PsyOps) are planned operations to convey selected information and indicators to audiences to influence their emotions, motives, objective reasoning, and ultimately the behaviour of organizations, groups, and individuals. The US military regarded PsyOps as an integral part of warfare during the Korean War (1950-1953) and the Second Indochina War (1955-1975). PsyOps were extensively used in Vietnam, with white (public)propaganda under the United States Information Agency and Military Assistance Command Vietnam, and grey and black (covert) propaganda under the Central Intelligence Agency and the Studies and Observation Group.