 It was disbanded on 9 July 2002 by its last chairperson, South African President Thabo Mbeki, and replaced by the African Union (AU).Some of the key aims of the OAU were to encourage political and economic integration among member states, and to eradicate colonialism and neo-colonialism from the African continent.Although it achieved some success, there were also differences of opinion as to how that was going to be achieved.