Massawa or Mitsiwa is a port city in the Northern Red Sea region of Eritrea, located on the Red Sea at the northern end of the Gulf of Zula beside the Dahlak Archipelago. It has been a historically important port for many centuries. Massawa has been ruled or occupied by a succession of polities during its history, including the Kingdom of Aksum, the Ethiopian Empire, the Ottoman Empire and the Kingdom of Italy.
Jerónimo Lobo was a Portuguese Jesuit missionary. He took part in the unsuccessful efforts to convert Ethiopia from the native Ethiopian church to Roman Catholicism until the expulsion of the Jesuits in 1643. Afterwards he wrote an account of his time in Ethiopia, Itinerário, which is an important source for the history and culture of that country.
Ahmad ibn Ibrahim al-Ghazi was the Imam of the Adal Sultanate from 1527 to 1543. Commonly named Ahmed Gragn in Amharic and Gurey in Somali, both meaning the left-handed, he led the invasion and conquest of Abyssinia from the Sultanate of Adal during the Ethiopian-Adal War. He is often referred to as the "King of Zeila" in medieval texts.
Galawdewos, also known as Mar Gelawdewos, was Emperor of Ethiopia from 3 September 1540 until his death in 1559, and a member of the Solomonic dynasty. His throne name was Atsnaph Sagad I. A male line descendant of medieval Amhara kings, he was a younger son of Dawit II and Seble Wongel.
Estêvão da Gama was the Portuguese governor of Portuguese Gold Coast (1529–1535) and Portuguese India (1540–1542). Named after his paternal grandfather Estêvão da Gama, Estêvão was the second son of Vasco da Gama, and the brother of Cristóvão da Gama.
The Battle of Wayna Daga was a large-scale battle between the Ethiopian forces and the Portuguese Empire and the forces of the Adal Sultanate and the Ottoman Empire in the east of Lake Tana in Ethiopia on 21 February 1543. The available sources give different dates for the battle. 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. Imam Ahmad was killed in the battle and his followers were utterly routed.
The Battle of Baçente was fought on February 2, 1542, when a Portuguese army under Cristóvão da Gama took a hillfort held by Adalite forces in northern Ethiopia. The Portuguese suffered minimal casualties, while the defenders were reportedly all killed.
The Battle of Jarte was fought from 4 to 16 April 1542 between the forces of Ahmad ibn Ibrahim al-Ghazi and the Ethiopian Empire assisted by a Portuguese expeditionary force led by Cristóvão da Gama. The Abyssinians and Portuguese were victorious, with Ahmad Gurey wounded by the outnumbered Christian force, and the Adalites forced to retreat.
Yeshaq was the Bahr Negus during the mid to late 16th century. A subordinate of Ethiopian Emperor Dawit II, he was noted for supporting Gelawdewos during the Ethiopian-Adal war, and rebelling against his successors.
Cristóvão da Gama, anglicised as Christopher da Gama, was a Portuguese military commander who led a Portuguese army of 400 musketeers to assist Ethiopia that faced Islamic Jihad from the Adal Sultanate led by Imam Ahmad ibn Ibrahim al-Ghazi.
Debarwa is a market town in central Eritrea. It is situated about 25 kilometers south of the capital Asmara, and has a population of about 25,000 inhabitants. It is the capital of the Debarwa district (Tsilima) in the Debub ("Southern") administrative region.
The Ethiopian–Adal War or Abyssinian–Adal War, also known in Arabic as Futūḥ Al-Ḥabaša, was a military conflict between the Christian Ethiopian Empire and the Muslim Adal Sultanate from 1529 to 1543. The Christian Ethiopian troops consisted of the Amhara, Tigrayans, Tigrinya and Agaw people, and at the closing of the war, supported by the Portuguese Empire with no less than four hundred musketeers. The Adal forces were composed of Harla, Somali, Afar, as well as Arab and Turkish gunmen. Both sides would see the Maya mercenaries at times join their ranks.
The Ottoman-Portuguese conflicts were a period of conflict during the Ottoman–Portuguese confrontations and series of armed military encounters between the Portuguese Empire and the Ottoman Empire along with regional allies in and along the Indian Ocean, Persian Gulf, and Red Sea.
The military history of Somalia encompasses the major conventional wars, conflicts and skirmishes involving the historic empires, kingdoms and sultanates in the territory of present-day Somalia, through to modern times. It also covers the martial traditions, military architecture and hardware employed by Somali armies and their opponents.
Medri Bahri or Mereb Melash, also known as Ma'ikele Bahr or Bahr Melash was a semi-autonomous province of the Ethiopian Empire located north of the Mareb River, in the Eritrean highlands (Kebassa) and some surrounding areas. Mereb Melash corresponds to the administrative territory ruled by the Bahr Negus in medieval times. Mereb Melash comprised the historical provinces of Hamasien and Seraye.
The Ottoman Empire conquered the Habesh starting in 1557, when Özdemir Pasha took the port city of Massawa and the adjacent city of Arqiqo, even taking Debarwa, then capital of the local ruler Bahr negus Yeshaq. They administered this area as the province of Habesh. Yeshaq sought the assistance of emperor Gelawdewos, reinforced by a large Abyssinian army, he recaptured Debarwa, taking all the gold the invaders had piled within. In 1560 Yeshaq, disillusioned with the new Emperor of Ethiopia, revolted with Ottoman support but pledged his support again with the crowning of Emperor Sarsa Dengel. However, not long after, Yeshaq revolted once again with Ottoman support but was defeated once and for all, leaving the Ottomans with domain over Massawa, Arqiqo, and some of the nearby coastal environs, which were soon transferred to the control of Beja Na'ibs (deputies).
Seble Wongel was Empress of Ethiopia through her marriage to Lebna Dengel. She is well-known as a key political and military figure during the Ethiopian–Adal War, as well as the reigns of her sons and grandson.
The Battle of Suez occurred in 1541 and was a failed attack by the Portuguese against the Ottomans.
The Battle of El Tor was a military engagement that took place in 1541, between Portuguese forces under the command of the Governor of India Dom Estevão da Gama and those of the Ottoman Empire then in the city of El Tor, on the Sinai Peninsula. The Turks were driven from the city, but at the request of Christian monks from the Monastery of Saint Catherine the Portuguese spared the city from being plundered, and celebrated a mass and a knighting ceremony therein.
Somali–Portuguese conflicts refers to the armed engagements between Portuguese forces and Somali forces, namely those of the Adal Sultanate and the cities of Barawa and Mogadishu in the 16th century.
Portuguese Empire 
Adal Sultanate