Radio propaganda is propaganda aimed at influencing attitudes towards a certain cause or position, delivered through radio broadcast. The power of radio propaganda came from its revolutionary nature. The radio, like later technological advances in the media, allowed information to be transmitted quickly and uniformly to vast populations. Internationally, the radio was an early and powerful recruiting tool for propaganda campaigns.
Before television, radio was by far the most effective way to prevent or promote social change. In many areas, it still is. Radio propaganda can be broadcast over great distances to a large audience at a relatively low cost. Through radio, a propagandist can bring his voice and all the persuasive power of his emotions to millions of people.[1] A similar approach is used in every war employing radio propaganda: aside from convincing those on the home front of the necessity of war, a different kind of propaganda must be directed towards the enemy. Radio became a powerful propaganda tool because it ignored national borders and made enemy lines more accessible. One of the most common ways hosts got the civilian and enemy populations to listen to their broadcasts was by dropping leaflets from hot air balloons or airplanes. Most programs were broadcast on selected stations at certain times of the day; the dropped leaflets explained exactly when and where the broadcasts could be heard.