Established on 9 July 2002 , the AU was formed as a successor to the Organisation of African Unity ( OAU ) .
The African Union ( AU ) is a union of all 55 African states .
Established on 9 July 2002 , the union was formed as a successor to the Organisation of African Unity ( OAU ) .
The African Union ( AU ) is a union of all 55 African states .