In October 2011, a coordinated operation between the Somali military and the Kenyan military, Operation Linda Nchi, began against the Al-Shabaab group of insurgents in southern Somalia. The mission was officially led by the Somali army, with the Kenyan forces providing a support role. In early June 2012, Kenyan troops were formally integrated into AMISOM. By September 2012, the Somali National Army and allied Kenyan African Union forces and Raskamboni militia had managed to capture Al-Shabaab's last major stronghold, the southern port of Kismayo, during the Battle of Kismayo.