 For example, in the Korean War, approximately one-third of the total prisoner of war (POW) population polled by the United Nations (UN) forces claimed to have surrendered at least in part because of the propaganda leaflets.The contributions of PSYOP in the first Persian Gulf War have also been corroborated through POW interviews.Ninety-eight percent of the 87,000 POWs captured either possessed or had seen PSYOP leaflets that provided them with instructions on how to approach U.S. troops to surrender.