The union was formed , with Addis Ababa , Ethiopia , as its headquarters , on 26 June 2001 .
The African Union ( AU ) is a 55 - member federation consisting of all of Africa 's states .
The union was formed , with Addis Ababa , Ethiopia , as Africa 's headquarters , on 26 June 2001 .
The African Union ( AU ) is a 55 - member federation consisting of all of Africa 's states .