During World War II, propaganda was an important tool on all sides. It was from this extensive use of propaganda tools that the formal definitions of white, black, and gray propaganda were developed—and it wasn’t always possible for either side to tell the difference. White propaganda was that whose origin was clearly labeled and which had a transparent purpose. Gray propaganda is information of questionable origin that is never sourced and whose accuracy is doubtful. Black propaganda is information put out by an opposing government or institution and made to look as though it came from a friendly source.