 The Sultanate was incorporated into Italian East Africa in 1936, and became part of Ethiopia in 1945, although nominal Sultans continued to be named under Ethiopian rule and the region continued to enjoy considerable autonomy within Ethiopia during the 1950s to 1970s.Afar society has traditionally been divided into petty kingdoms, each ruled by its own Sultan.The Imamate of Aussa was carved out of the Sultanate of Harar and the Adal Sultanate in 1577, when Muhammed Jasa moved his capital from Harar to Aussa (Asaita) with the split of the Adal Sultanate into Aussa and the Sultanate of Harar.