The Sultanate of Dahlak was a small medieval kingdom covering the Dahlak Archipelago and parts of the African Red Sea coast in what is now Eritrea. First attested in 1093, it quickly profited from its location between Abyssinia and Yemen as well as Egypt and India. After the mid 13th century Dahlak lost its trade monopoly and subsequently started to decline. Both the Ethiopian empire and Yemen tried to enforce their authority over the sultanate. It was eventually annexed by the Ottomans in 1557, who made it part of their Abyssinian province.