The
Battle of Wayna Daga (
Amharic for "grape-cultivating altitude") occurred on 21 February 1543 east of
Lake Tana in
Ethiopia. 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. Tradition states that Ahmad was killed by a Portuguese musketeer, who had charged alone into the Muslim lines. Once the Imam's soldiers learned of his death, they fled the battlefield.