The following Union Army units and commanders fought in the Knoxville Campaign and subsequent East Tennessee operations during the American Civil War from November 4 to December 23, 1863 under the command of Maj. Gen. Ambrose E. Burnside. Engagements fought during this time included the battles of Campbell's Station and Fort Sanders and the siege of Knoxville. Order of battle compiled from the army organization during the campaign and return of casualties. The Confederate order of battle is shown separately.