Atrocity propaganda is a term referring to the spreading of deliberate fabrications or exaggerations about the crimes committed by an enemy, constituting a form of psychological warfare.
The inherently violent nature of war means that exaggeration and invention of atrocities often becomes the main staple of propaganda. Patriotism is often not enough to make people hate, and propaganda is also necessary. "So great are the psychological resistances to war in modern nations", wrote Harold Lasswell, "that every war must appear to be a war of defense against a menacing, murderous aggressor. There must be no ambiguity about who the public is to hate." Human testimony is deemed unreliable even in ordinary circumstances, but in wartime, it can be further muddled by bias, sentiment, and misguided patriotism, becoming of no value whatsoever in establishing the truth.
According to Paul Linebarger, atrocity propaganda leads to real atrocities, as it incites the enemy into committing more atrocities, and, by heating up passions, it increases the chances of one's own side committing atrocities, in revenge for the ones reported in propaganda. Atrocity propaganda might also lead the public to mistrust reports of actual atrocities. In January 1944, Arthur Koestler wrote of his frustration at trying to communicate what he had witnessed in Nazi-occupied Europe: the legacy of anti-German stories during World War I, many of which were debunked in the postwar years, meant that these reports were received with considerable amounts of skepticism.
Like propaganda, atrocity rumors detailing exaggerated or invented crimes perpetrated by enemies are also circulated to vilify the opposing side.
By establishing a baseline lie and painting the enemy as a monster, atrocity propaganda serves as an intelligence function, since it wastes the time and resources of the enemy's counterintelligence services to defend itself. Atrocity propaganda can either be white, gray, or black. Atrocity propaganda is often white, as it makes no attempt to hide its source and is overt in nature. The propagandists' goal is to influence perceptions, attitudes, opinions, and policies; often targeting officials at all levels of government. Atrocity propaganda is violent, gloomy, and portrays doom to help rile up and get the public excited. It dehumanizes the enemy, making them easier to kill. Wars have become more serious, and less gentlemanly; the enemy must now be taken into account not merely as a man, but as a fanatic. So, "falsehood is a recognized and extremely useful weapon in warfare, and every country uses it quite deliberately to deceive its own people, attract neutrals, and to mislead the enemy." Harold Lasswell saw it as a handy rule for arousing hate, and that "if at first they do not enrage, use an atrocity. It has been employed with unvarying success in every conflict known to man."