For years after World War II, in most of what was considered the "civilized" world, the truth behind Japanese Imperial Army Unit 731 was quietly …
Inside Unit 731, Japan's Gruesome WWII Human Experiment Program
The Imperial Japanese Army during WWII committed some of the most heinous war crimes ever at its covert Unit 731. Why is it still so shrouded in secrecy? Plus, why the Maginot Line failed, Hitler's Blitzkrieg tactic and other WWII history.