The Battle of Wayna Daga was a large-scale battle between the Ethiopian forces and the Portuguese Empire and the forces of the Adal Sultanate and the Ottoman Empire in the east of Lake Tana in Ethiopia on 21 February 1543. The available sources give different dates for the battle. Led by the Emperor Galawdewos, the combined army of Ethiopian and Portuguese troops defeated the Adal-Ottoman army led by Imam Ahmad ibn Ibrahim al-Ghazi. Imam Ahmad was killed in the battle and his followers were utterly routed[
