 During World War II, American propaganda got really bizarre. Some of the most dark and disturbing propaganda stories were aimed at the Japanese. Media often described them as a yellow vermin, and an official US Navy film called them Living Snarling Rats. These stories were intended to dehumanize the Japanese and were effective to a scary degree. Expert historians know from first-hand accounts told by American servicemen that troops often had the habit of taking trophies from the bodies of Imperial Japanese soldiers. These morbid souvenirs often included teeth, ears, nose, and other parts. In some of the darkest moments of World War II, the most common and scariest trophies were entire heads, which were boiled down, essentially preserving them for years to come. It wasn't uncommon to find American World War II bases covered with such disturbing decor, and some parts were even mailed back to the victims' families.