The Death Eaters was the name given to followers of Lord Voldemort. The group primarily consisted of wizards and witches who were radical pure blood supremacists, who practised the Dark Arts with reckless abandon and without regard to or fear of wizarding law.
Lord Voldemort used this select group of wizards and witches during both the First and Second Wizarding Wars, employing them as his elite force. They often wore black hoods and masks with snake-like eye slits to cover their faces. Only the members of the inner circle of the Death Eaters had Dark Marks burned into their left forearms. When Voldemort touched one of them, each of the Death Eaters felt it, signalling for them to Apparate to their leader's side.