The UN Security Council established the International Security Assistance Force (ISAF) in December 2001 to provide basic security for the people of Afghanistan and assist the Karzai administration. Since 2002, the total number of ISAF and U.S. forces have climbed from 15,000 to 150,000. The majority of them belong to various branches of the United States Armed Forces, who are not only fighting the Taliban insurgency but also training the Afghan Armed Forces and Afghan National Police.