The African Union Mission in Somalia (AMISOM) is an active, regional peacekeeping mission operated by the African Union with the approval of the United Nations in Somalia. It is mandated to support transitional governmental structures, implement a national security plan, train the Somali security forces, and to assist in creating a secure environment for the delivery of humanitarian aid. As part of its duties, AMISOM also supports the Transitional Federal Government's forces in their battle against Al-Shabaab militants.

AMISOM was created by the African Union's Peace and Security Council on 19 January 2007 with an initial six month mandate. On 21 February 2007 the United Nations Security Council approved the mission's mandate. Subsequent six-monthly renewals of AMISOM's mandate by the African Union Peace and Security Council have also been authorised by the United Nations Security Council.

AMISOM's UN mandate was extended for a further six month in August 2008 by UNSCR 1831. The AMISOM’s mandate has been extended each period that it has been up for review. It is currently set to be reviewed again on 16 January 2013.