In 1800 the arrondissements of Douai, Avesnes, Bergues, Cambrai, Cassel, Lille and Valenciennes were established. In 1803 Dunkirk replaced Bergues as subprefecture. Lille replaced Douai as prefecture in 1804. In 1824 the arrondissement of Valenciennes was created. In 1857 Hazebrouck replaced Cassel as subprefecture. The arrondissement of Hazebrouck was disbanded in 1926.[2]