The OWI Bureau of Motion Pictures (BMP) worked with the Hollywood movie studios to produce films that advanced American war aims. According to Elmer Davis, "The easiest way to inject a propaganda idea into most people’s minds is to let it go through the medium of an entertainment picture when they do not realize that they are being propagandized." Successful films depicted the Allied armed forces as valiant "Freedom fighters", and advocated for civilian participation, such as conserving fuel or donating food to troops.