The International Security Assistance Force (ISAF) was a NATO-led security mission in Afghanistan, established by the United Nations Security Council in December 2001 by Resolution 1386, as envisaged by the Bonn Agreement.[1][2] Its main purpose was to train the Afghan National Security Forces (ANSF) and assist Afghanistan in rebuilding key government institutions, but was also engaged in the 2001–present war with the Taliban insurgency.