The Ethiopian region is one of the proposed homelands of the Horn of Africa's various Afro-Asiatic communities.[64] During the Middle Ages, Somali Imam Ahmad ibn Ibrihim al-Ghazi (Ahmad Gurey or Gragn) led a Conquest of Abyssinia (Futuh al-Habash), which brought three-quarters of the Christian Ethiopian Empire under the power of the Muslim Adal Sultanate.[65][66] With an army mainly composed of Somalis,[67] Many historians trace the origins of tensions between Somalia and Ethiopia to this war.[68] In the 1960s and 1970s, a territorial dispute over the Ogaden region led to various armed confrontations between the Somali and Ethiopian militaries.