Lesson learned long ago: No matter how silly and cheesy it may seem, psyops leaflets work! I always thought psyops was cool but I'm really starting to respect the hell out of that small branch of the armed forces... Probably responsible for taking nearly as many soldiers out of the fight as the combat arms guys, only we don't have to bury people when psyops is done with them.
Can't for the next country to be disciplined(what a long list).
Yes. They helped win the war and saved thousands and thousands of lives on both sides. And they did it by employing an almost uniquely American strategy -- telling the truth.