Millennium (ミレニアム, Mireniamu) is a fictional Nazi organization from the manga series Hellsing by Kouta Hirano. They serve as the primary antagonists in the series. Its name is a reference to the "Thousand Year Reich" which Adolf Hitler sought to establish during World War II. Within the series, the mysterious group pools its resources after the war and with, for unknown reasons, substantial help from the Vatican (which later broke away from it upon seeing the error of their ways), is able to relocate to Brazil to go into hiding. Millennium's researchers discover a way to transform humans into vampires through unknown means (although it is suggested that some kind of surgery is involved), and monitors the implanted computer chips.