To operate the Cartographically Based Interactive Digital Archive (CBIDA), please scroll through different years to visualize the collapse of the kingdom of Oyo between 1816 and 1836. For explanations about intra-African conflict, "click" on individual political states for each year. For primary source materials for each ship, including shipping manifests, trail records of ships captured by British naval vessels, registers of Liberated Africans, and imagery, "click" on each individual ship. To explore annual heat maps of internal conflict on a port-by-port basis, please explore the development link: http://dev.regid.ca/YD.