Propaganda: the spreading of ideas, information, or rumor for the purpose of helping or injuring an institution, a cause, or a person.
"North and South Korea on Alert Over Loudspeakers Blaring Propaganda
AUG. 21, 2015
After a period of calm — or relative calm, at least — along the heavily militarized border between North and South Korea, both sides were back on alert Friday. The unlikely cause: Loudspeakers.
North Korea said Friday morning that its leader, Kim Jong-un, had ordered military units to be ready to attack loudspeakers near the border that the South has used in recent days to blare propaganda messages."