In a grand hall in the middle of nowhere, a place no one ever thought to look, lay an underground base currently filled with various people and creatures of all kinds. The whole place looked dimly lit, and all the creatures moving around had one thing in common - the black uniform they donned in the darkness. Though they were all in different groups signifying their kind, they were alert and ready for any attack that may be started by the other groups. They were loyal to their leaders and could give their lives for them if required. It was in their make-up, rooted in their DNA.
There were instances where parents were ordered to slaughter their children, and vice versa. However, none of them batted an eye at their blind loyalty. Whatever order they received needed to be executed before they could find rest.