 On January 19, 2007 the mission was formally defined and approved by the African Union at the 69th meeting of the Peace and Security Council.On January 22, 2007 Malawi agreed to send a half-battalion to a battalion (ranging widely anywhere between approximately 400 to 1,200 troops) for a peacekeeping mission to Somalia.On January 24, 2007 Nigeria pledged a battalion (a force between 770 and 1,100 troops) to join the Somali peacekeeping mission.