Resolute Support or Operation Resolute Support is a NATO-led training, advisory, assistance, and counter-terror mission consisting of 12,500 soldiers in the Islamic Republic of Afghanistan, which began on January 1, 2015.It is a follow-on mission to the International Security Assistance Force (ISAF) which was completed on December 28, 2014.] The mission's current commander is U.S. Army General John F. Campbell. Credits: Gail McCabe