Ahmad ibn Ibrahim al-Ghazi
Imam Ahmad is regarded by most scholars as an ethnic Somali. However, few historians have disputed his ethnicity, with Ahmad sometimes interpreted as being a Harari. Many Somali clans played a strong role in Gurey's conquest of Abyssinia, however these clans went to war not so much as Somalis but as Muslims.
Imam Ahmad was born in 1506 at Zeila, Adal Sultanate Due to the unislamic rule during the reign of Sultan Abu Bakr ibn Muhammad, Ahmad would leave Harar for Hubat. He married Bati del Wambara, the daughter of Mahfuz, the Governor of Zeila. In 1531, Bati would give birth to their first child named Muhammad.
Ethiopian historians such as Azazh T'ino and Bahrey have written that during the period of his rise to power, Ahmad ibn Ibrahim al-Ghazi had converted many Oromo pastoral people to Islam.
On April 4, after the two unfamiliar armies had exchanged messages and stared at each other for a few days, da Gama formed his troops into an infantry square and marched against the Imam's lines, repelling successive waves of Muslim attacks with musket and cannon. This battle ended when Imam Ahmad was wounded in the leg by a chance shot; seeing his banners signal retreat, the Portuguese and their Abyssinian allies fell upon the disorganized Muslims, who suffered losses but managed to reform next to the river on the distant side.
His wife Bati del Wambara managed to escape the battlefield with a remnant of the Turkish soldiers, and they made their way back to Harar, where she rallied his followers. Intent on avenging her husband's death, she married his nephew Nur ibn Mujahid on condition that Nur would avenge Imam Ahmad's defeat. In 1554–55, Nur departed on a Jihad, or Holy War, in the eastern Abyssinian lowlands of Bale, and Hadiya. In 1559, he invaded Fatagar, where he fought against the Abyssinian emperor Galawdewos, and killed him in battle.