Ouagadougou was the main Mossi Kingdom in what is now Burkina Faso, with its origins in the 15th century. The Mossi were a warlike nation with formidable cavalry, who had successfully resisted all past invaders. With the decline of the central state in the 18th century, Yatenga, with its capital at Ouahigouya, had become independent of Ouagadougou, as had other places. During the 19th century there was sporadic warfare among the Mossi.