He previously served as FORSCOM's Deputy Commanding General and Chief of Staff from April 2006 to January 2007.

[1] He earned his commission through Reserve Officers' Training Corps at Louisiana State University in Baton Rouge, from which he received a Bachelor of Arts degree in History.

[citation needed] Campbell's staff assignments included service as Operations Officer, 3–63 Armor, Augsburg, Germany; Chief, Exercise Branch, 3d Infantry Division, Wuerzburg, Germany; Plans and Operations Officer, Combined Field Army, Republic of Korea; Senior Task Force Observer/Controller and later Deputy Commander, Operations Group, Combat Maneuver Training Center, Hohenfels, Germany; Chief of Staff, 2d Infantry Division (Mechanized), Eighth Army, South Korea; Assistant Division Commander, 1st Cavalry Division, Fort Hood, Texas; Chief of Staff, I Corps and Fort Lewis, Fort Lewis, Washington; Deputy Commanding General, Third Army, Fort McPherson, Georgia; Chief of Staff, United States Army Europe and Seventh Army, Germany; Chief of Staff, United States Central Command; and Chief of Staff, United Nations Command, Combined Forces Command, and United States Forces Korea.

[citation needed] Campbell received a Master of Military Art and Science from the United States Army Command and General Staff College.

[3][4] His military awards and decorations include: This article incorporates public domain material from the United States Army