Unit 731. At least I don't like talking about it since it's so vile and evil
my_son_is_a_box:
Not just that it existed, but that most everyone involved walked free, and the whole thing was kept secret by the US government until the 1980s.
catonsteroids:
Definitely not for the faint of heart if you want to know what went on. It’s pure evil, animalistic, barbaric, and absolutely sick, all in the name of “research”.