A retired general in the U.S. Army with 37 years of active duty service, Campbell was most recently the Commander of NATO Forces for the ISAF/Resolute Support Mission and Commander of United States Forces—Afghanistan from August 2014 to March of 2016. Prior to this command assignment, he served as the 34th Vice Chief of Staff of the U.S. Army and the Deputy Chief of Staff for Operations-G3, 5, 7 running the day to day operations of the U.S. Army. Campbell is a graduate of West Point and holds master’s degrees in Public Administration from Golden Gate University and in National Security Strategy from the Army War College.