Deceiving and demotivating an enemy, enlisting and engaging an ally, all of these are necessary in war. You have to get people to do things or to stop doing things. And for that, you need to understand them at a narrative level. Histories, cultures, belief systems… what are you up against, and what facts or fiction can you inject to change or influence it? Major Ray Ambrozak sheds some light on psychological warfare during the Vietnam War.