The Black Brigade aka. Grindelwald's army was an organization of wizards and witches followed the Dark Wizard Gellert Grindelwald in the early twentieth century. They sought to create a worldwide wizarding empire, which would overturn the International Statute of Wizarding Secrecy and force the Muggle population into slavery under their motto: "For the Greater Good" At the centrepiece of this cruel plan was the Deathly Hallows, which, united, Grindelwald believed would make him and his followers invincible.