Psychological factors are an integral part of all battlefields. Each unit movement and everyconquest of terrain psychologically affect the battlefield participants and an audience of friendly, neutral, or hostile groups. The psychological effect of combat actions can be seen in theheightened morale of a successful unit or in the discouragement and fear of a defeated unit.Properly manipulated attitudes can modify the behavior and the combat effectiveness of thesoldier and the unit.This manual provides information and guidance for the conduct of psychological operations(PSYOP) in general, limited, and cold war. The doctrine, techniques, and procedures found hereinare applicable to conventional warfare, unconventional warfare (UW), and foreign internaldefense (FID) operations. This manual should be used in conjunction with other official manualsand publications that provide staff organization procedures and guidance for doctrine, fieldoperations, and maintenance of equipment.