NATO took command of the United Nations-mandated International Security Assistance Force (ISAF) in Afghanistan in August 2003. Its mission was to enable the Afghan authorities to provide effective security across the country and ensure that it would never again be a safe haven for terrorists. ISAF helped build the capacity of the Afghan national security forces. As these forces grew stronger, in agreement with the Afghan authorities, they gradually took responsibility for security across the country, and ISAF’s mission was completed at the end of 2014. However, support for the continued development of the Afghan security forces and institutions, and wider cooperation with Afghanistan continue.