Castillo Armas's army was not large enough to defeat the Guatemalan military, even with US-supplied planes. Therefore, the plans for Operation PBSuccess called for a campaign of psychological warfare, which would present Castillo Armas's victory as a "fait accompli" to the Guatemalan people, and would force Árbenz to resign. The US propaganda campaign began well before the invasion, with the United States Information Agency writing hundreds of articles on Guatemala based on CIA reports, and distributing tens of thousands of leaflets throughout Latin America. The CIA persuaded the governments that were friendly to it to screen video footage of Guatemala that supported the US version of events. The most wide-reaching psychological weapon was the radio station known as the "Voice of Liberation". This station began broadcasting on May 1, 1954, carrying anti-communist messages and telling its listeners to resist the Árbenz government and support the liberating forces of Castillo Armas. The station claimed to be broadcasting from deep within the jungles of the Guatemalan hinterland, a message that many listeners believed. In actuality, the broadcasts were concocted in Miami by Guatemalan exiles, flown to Central America, and broadcast through a mobile transmitter.