Continuously inhabited for the last 2,500 years by numerous and varied ethnic groups, some Afar or other Cushitic-speaking populations, and the majority Somalis. From the 1st century numerous ports including Hafun and Mosylon-Bandar Gori were trading with Roman and Greek sailors.
The northwest was part of the Aksumite Empire from about the 3rd century to the 7th but between 700 AD and 1200 AD Islam became firmly established, especially with the founding of Mogadishu in 900. The period following, 1200 AD to 1500 AD, saw the rise of numerous Somali city-states and kingdoms. In northwestern Somalia, the Sultanate of Adal (a multi-ethnic state comprised of Afars, Somalis and Hararis) with Ahmad ibn Ibrihim al-Ghazi as their leader in 1520, successfully conquered three-quarters of Ethiopia before being defeated by a joint Ethiopian-Portuguese force at the Battle of Wayna Daga on February 21, 1543.
The Ajuuraan Sultanate flourished from the 14th to the 17th centuries. Following the collapse of Adal and Ajuuraan in the 17th century, the region saw the emergence of new city states such as the Sultanates of eastern Sanaag, of Bari, of Geledi-Afgoye, of Gasar Gudde-Lugh Ganane, of Mogadishu and the Benadir coast, and of Hobyo.
