captured and executed in Zeila, which was sacked. After the war, the reigning king had his minstrels compose a song praising his victory, which contains the first written record of the word "Somali". Upon the return of Sa'ad ad-Din II's sons a few years later, the dynasty took the new title of "king of Adal," instead of the formerly dominant region, Ifat. The area remained under Ethiopian control for another century or so. However, starting around 1527 under the charismatic leadership of Imam Ahmad ibn Ibrihim al-Ghazi (Gurey in Somali, Gragn in Amharic, both meaning "left-handed"), Adal revolted and invaded medieval Ethiopia. Regrouped Muslim armies with Ottoman support and arms marched into Ethiopia employing scorched earth tactics and slaughtered any Ethiopian that refused to convert from Ethiopian Orthodox Christianity to Islam. Moreover, hundreds of churches were destroyed during the invasion, and an estimated 80% of the manuscripts in the country were destroyed in the process. Adal's use of firearms, still only rarely used in Ethiopia, allowed the conquest of well over half of Ethiopia, reaching as far north as Tigray. The complete conquest of Ethiopia was averted by the timely arrival of a Portuguese expedition led by Cristovão da Gama, son of the famed navigator Vasco da Gama. The Portuguese had been in the area earlier in early 16th centuries (in search of the legendary priest-king Prester John), and although a diplomatic mission from Portugal, led by Rodrigo de Lima, had failed to improve relations between the countries, they responded to the Ethiopian pleas for help and sent a military expedition to their fellow Christians. a Portuguese fleet under the command of Estêvão da Gama was sent from India and arrived at Massawa in February 1541. Here he received an ambassador from the Emperor beseeching him to send help against the Muslims, and in July following a force of 400 musketeers, under the command of Christovão da Gama, younger brother of the admiral, marched into the interior, and being joined by Ethiopian troops they were at first successful against the Somalis but they were subsequently defeated at the Battle of Wofla (28 August 1542), and their commander captured and executed. On February 21, 1543, however, a joint Portuguese-Ethiopian force defeated the Somali-Ottoman army at the Battle of Wayna Daga, in which al-Ghazi was killed and the war won. Ahmed al-Ghazi's widow married Nur ibn Mujahid in return for his promise