Oyo Empire gunshots scared the Oyo cavalry horses and prevented their charging. Dahomey's army also built fortifications such as trenches, which forced the Oyo army to fight as infantry. The battle lasted four days, but the Yoruba were eventually victorious after reinforcements arrived. Dahomey was forced to pay tribute to Oyo. The Yoruba invaded Dahomey seven times before finally subjugating the small kingdom in 1748. With its cavalry, Oyo campaigned successfully in conquest and suppression over great distances. The Oyo army was able to attack defensive fortifications, but it was harder to supply an army, and they withdrew when supplies ran out.
History of the Yoruba people all cases, however, Yoruba monarchs were subject to the continuing approval of their constituents as a matter of policy, and could be easily compelled to abdicate for demonstrating dictatorial tendencies or incompetence. The order to vacate the throne was usually communicated through an "aroko" or symbolic message, which usually took the form of parrots' eggs delivered in a covered calabash bowl by the senators. By the time it was the 19th century, the Kingdom had lost its control of the trade routes. The kingdom of Oyo had fallen in 1837. The Yoruba people believe there are 401 deities. The Yoruba