sentences:  Morocco, which claims sovereignty over the SADR's territory, withdrew from the Organisation of African Unity, the AU's predecessor, in 1984 due to the admission of the SADR as a member.However, on 30 January 2017, the AU admitted Morocco as a member state.The principal topic for debate at the July 2007 AU summit held in Accra, Ghana, was the creation of a Union Government, with the aim of moving towards a United States of Africa.