The Brunswick Ducal Corps (German: Herzoglich Braunschweigisches Korps), commonly known as the Black Brunswickers in English and the Schwarze Schar (Black Troop, Black Horde, or Black Host) or Schwarze Legion (Black Legion) in German, were a military unit in the Napoleonic Wars. The corps was raised from volunteers by German-born Frederick William, Duke of Brunswick-Wolfenbüttel (1771–1815) .