What do Moses and Humphrey Bogart, leaflets and hospitals, bombs and pin-ups have in common? They all relate to psychological warfare. This concept is as old as war itself. From early testimonies to the present day, from the Old Testament to Ground Zero, Thomas A. Müller reveals astonishing and even shocking facets of a field of warfare that, while remaining fundamentally unchanged over the centuries, has undergone unprecedented developments and dimensions with the advent of electronic media. Since the Vietnam War, winning hearts and minds in the operational area and the targeted influence of public opinion through professional PR have also become established. For non-combat operations, such as those of the UN, accompanying PSYOPS measures have become standard.