The Ethiopian–Adal war was a military conflict between the Ethiopian Empire and the Adal Sultanate from 1529 until 1543. The Imam Ahmad ibn Ibrihim al-Ghazi (nicknamed Gurey in Somali and Gragn in Amharic (ግራኝ Graññ), both meaning "the left-handed") came close to extinguishing the ancient realm of Ethiopia, and converting all of its subjects to Islam; the intervention of the European Cristóvão da Gama, son of the famous navigator Vasco da Gama, helped to prevent this outcome. Many historians trace the origins of hostility between Somalia and Ethiopia to this war. Some historians also argue that this conflict proved, through their use on both sides, the value of firearms such as the matchlock musket, cannons, and the arquebus over traditional weapons. Imam Ahmed was the first African commander to use cannon warfare on the continent during the Adal's conquest of the Ethiopian Empire under Dawit II.