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The Adal Sultanate, also known as the Adal Empire or Bar Saʿad dīn, was a medieval Sunni Muslim Empire which was located in the Horn of Africa. It was founded by Sabr ad-Din III on the Harar plateau in Adal after the fall of the Sultanate of Ifat. The kingdom flourished c. 1415 to 1577. At its height, the polity under Sultan Badlay controlled the territory stretching from Cape Guardafui in Somalia to the port city of Suakin in Sudan. The Adal Empire maintained a robust commercial and political relationship with the Ottoman Empire. Sultanate of Adal was alternatively known as the federation of Zeila.