The Organisation of African Unity was an intergovernmental organization established on 25 May 1963 in Addis Ababa, Ethiopia, with 33 signatory governments. One of the main heads for OAU's establishment was Kwame Nkrumah of Ghana. It was disbanded on 9 July 2002 by its last chairman, 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.

The African Union (AU) is a continental union of 55 member states located on the continent of Africa. The bloc was founded on 26 May 2001 in Addis Ababa, Ethiopia and launched on 9 July 2002 in Durban, South Africa. The intention of the AU was to replace the Organization of African Unity (OAU), established on 25 May 1963 in Addis Ababa by 32 signatory governments; the OAU was disbanded on 9 July 2002. The most important decisions of the AU are made by the Assembly of the African Union, a semi-annual meeting of the heads of state and government of its member states.