Home2004 Treaties and Agreements ...African Union (04-906) – Defense Cooperation hide African Union (04-906) – Defense Cooperation TIAS Office of Treaty Affairs September 6, 2004 Summary Defense: Cooperation Agreement effected by exchange of notes at Addis Ababa August 27 and September 6, 2004; entered into force September 6, 2004. Download Agreement [243 KB] Tags Defense Treaties and International Agreements