Imam Ahmed ibn Ibrahim Al Ghazi - The legendary hero of East Africa

Ahmad ibn Ibrahim al-Ghazi (Arabic: أحمد بن إبراهيم ال غازي‎) (c. 1507 – February 21, 1543) ("the Conqueror") was an Imam and General of Adal who invaded Ethiopia and defeated several Ethiopian Emperors, wreaking much damage on that kingdom. With the help of an army mainly composed of East Africans, Imam Ahmad (nicknamed Gurey in Somali and Gragn in Amharic (Graññ), both meaning "the left-handed"), embarked on a conquest which brought three-quarters of Ethiopia under the power of the Muslim Sultanate of Adal during the Ethiopian-Adal War from 1529-43.

The chronicle of Imam Ahmad's invasion of Ethiopia is depicted in various Somali, Ethiopian and other foreign sources. Imam Ahmad campaigned in Ethiopia in 1531, breaking Emperor Lebna Dengel's ability to resist in the Battle of Amba Sel on October 28. The Muslim army of Imam Ahmad then marched northward to loot the island monastery of Lake Hayq and the stone churches of Lalibela. When the Imam entered the province of Tigray, he defeated an Ethiopian army that confronted him there. On reaching Axum, he destroyed the Church of Our Lady Mary of Zion, in which the Ethiopian emperors had for centuries been crowned.

The Ethiopians were forced to ask for help from the Portuguese, who landed at the port of Massawa on February 10, 1541, during the reign of the emperor Gelawdewos. The force was led by Cristóvão da Gama and included 400 musketeers as well as a number of artisans and other non-combatants. Da Gama and Imam Ahmad met on April 1, 1542 at Jarte, which Trimingham has identified with Anasa, between Amba Alagi and Lake Ashenge. Here the Portuguese had their first glimpse of Ahmad, as recorded by Castanhoso:

"While his camp was being pitched, the king of Zeila [Imam Ahmad] ascended a hill with several horse and some foot to examine us: he halted on the top with three hundred horse and three large banners, two white with red moons, and one red with a white moon, which always accompanied him, and by which he was recognized."

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 Ethiopian allies fell upon the disorganized Muslims, who suffered losses but managed to reform next to the river on the distant side.

Over the next several days, Imam Ahmad's forces were reinforced by arrivals of fresh troops. Understanding the need to act swiftly, da Gama on April 16 again formed a square which he led against Imam Ahmad's camp. Although the Muslims fought with more determination than two weeks earlier—their horse almost broke the Portuguese square—an opportune explosion of some gunpowder traumatized the horses on the Imam's side, and his army fled in disorder. Castanhoso laments that "the victory would have been complete this day had we only one hundred horses to finish it: for the King was carried on men's shoulders in a bed, accompanied by horsemen, and they fled in no order."

Reinforced by the arrival of the Bahr negus Yeshaq, da Gama marched southward after Imam Ahmad's force, coming within sight of him ten days later. However, the onset of the rainy season prevented da Gama from engaging Ahmad a third time. On the advice of Queen Sabla Wengel, da Gama made winter camp at Wofla near Lake Ashenge, still within sight of his opponent, while the Imam made his winter camp on Mount Zobil.

Knowing that victory lay in the number of firearms an army had, the Imam sent to his fellow Muslims for help. According to Abbé Joachim le Grand, Imam Ahmad received 2000 musketeers from Arabia, and artillery and 900 picked men from the Ottomans to assist him. Meanwhile, due to casualties and other duties, da Gama's force was reduced to 300 musketeers. After the rains ended, Imam Ahmad attacked the Portuguese camp and through weight of numbers killed all but 140 of da Gama's troops. Da Gama himself, badly wounded, was captured with ten of his men and after refusing an offer to spare his life if he would convert to Islam, was executed.

The survivors and Emperor Gelawdewos were afterward able to join forces and, drawing on the Portuguese supplies, attacked Ahmad on February 21, 1543 in the Battle of Wayna Daga, where their 9,000 troops managed to defeat the 15,000 soldiers under Imam Ahmad. The Imam was killed by a Portuguese musketeer, who was mortally wounded in avenging da Gama's death.

Source; http://www.ethiopiantreasures.toucansurf.com/pages/rel-war.htm