Dahomey conquered Allada, the origin for the royal family according to oral tradition, and in 1727 he conquered Whydah. This increased size of the kingdom, particularly along the Atlantic coast, and increased power made Dahomey into a regional power. The result was near constant warfare with the main regional state, the Oyo Empire, from 1728 until 1740. The warfare with the Oyo empire resulted in Dahomey assuming a tributary status to the Oyo empire. Tegbesu, also spelled as Tegbessou, was King of Dahomey, in present-day Benin, from 1740 until 1774. Tegbesu was not the oldest son of King Agaja (1718–1740), but
History of the Kingdom of Dahomey the city. In 1730 the war with Oyo ended and Dahomey retained domestic control but became a tributary of the Oyo empire. By the end of Agaja's reign, the Kingdom of Dahomey occupied significant area, particularly the crucial coastal slave trade cities. At the same time, Agaja created much of the administrative apparatus of the kingdom and instituted the key ceremony of the Annual Customs, or "Xwetanu" in Fon. Following the death of Agaja in 1740, the empire was defined by significant political struggle (although limited largely to within the palace walls) and deepening engagement with the slave trade. There