2779688 Wadai cavalry in Central Africa (colour litho) by French School, (20th century); Private Collection; (add.info.: Wadai cavalry in Central Africa. The Wadai, or Ouaddai, Empire was a kingdom that ruled an area to the east of Lake Chad from the 16th Century until they were conquered by the French in 1912. Ceux que nos soldats combattent dans le centre Africain. Les Cuirassiers du Ouadai. Illustration for Le Petit Journal, 5 February 1911.); 穢 Look and Learn.