When a modern administrative system was introduced in Ethiopia after the Second World War, the Afar areas controlled by Ethiopia were divided into the provinces of Eritrea, Tigray, Wollo, Shewa and Hararge. Tribal leaders, elders and religious and other dignitaries of the Afar tried unsuccessfully in the government from 1961 to end this division. Following an unsuccessful rebellion led by the Afar Sultan, Alimirah Hanfare, the Afar Liberation Front was founded in 1975 to promote the interests of the Afar people. Sultan Hanfadhe was shortly afterwards exiled to Saudi Arabia. Ethiopia's then-ruling communist Derg regime later established the Autonomous Region of Assab (now called Aseb and located in Eritrea), although low level insurrection continued until the early 1990s. In Djibouti, a similar movement simmered throughout the 1980s, eventually culminating in the Afar Insurgency in 1991. After the fall of the Derg that same year, Sultan Hanfadhe returned from exile.