The Lower Aulaqi sultans separated from the Upper Aulaqi in the 18th century. In the late 19th century, the area came under British influence and in 1890 the Upper Aulaqi Sultanate became a British protectorate. Eventually it also became a constituent state of the Aden Protectorate. The Upper Aulaqi Sultanate joined the Federation of South Arabia in June 1964, the last one to join. The last sultan was Sultan Awad ibn Salih Al Awlaqi.