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 him with significantly more power and money (the title "chacha" remains an important honorary position in Whydah to this day). In 1823, Ghezo led armies against Oyo and was this time able to end the tributary status of Dahomey and permanently weaken Oyo. Two major changes occurred in the 1840s and 1850s which significantly altered politics in Dahomey. First, the British who had been a major purchaser of slaves began taking an active stance in abolishing the slave trade in the 1830s. They sent multiple diplomatic parties to Ghezo to try to convince him to end Dahomey's participation in the