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
Dahomey the practice. During the Annual Custom, 500 prisoners would be sacrificed. In addition, when a ruler died, hundreds, to thousands of prisoners would be sacrificed. As many as 4,000 were reported killed In one of these ceremonies in 1727. Dahomey had a unique form of West African Vodun that linked together preexisting animist traditions with vodun practices. Oral history recounted that Hwanjile, a wife of Agaja and mother of Tegbessou, brought Vodun to the kingdom and ensured its spread. The primary deity is the combined Mawu-Lisa (Mawu having female characteristics and Lisa having male characteristics) and it is claimed that