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.
Yoruba people in the Atlantic slave trade Yoruba people in the Atlantic slave trade The Yoruba people, among the most heavily targeted, contributed significant cultural and economic influence upon the Atlantic slave trade during its run from approximately 1400 until 1900 CE. From 1400 onward, the Oyo Empire's imperial success made the Yoruba language a "lingua franca" almost to the shores of the Volta. Toward the end of the 18th century, the Oyo army was neglected as there was less need to conquer. Instead, Oyo directed more effort towards trading and acted as middlemen for both the Trans-Saharan and Trans-Atlantic slave trade. Europeans bringing salt arrived in