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Army of the Ohio

Army of the Ohio
Active 1861-1862
Country  United States of America
Branch United States Army
Type Field army
Engagements American Civil War
Don Carlos Buell
William S. Rosecrans
Ambrose Burnside
John M. Schofield

The Army of the Ohio was the name of two Union armies in the American Civil War. The first army became the Army of the Cumberland and the second army was created in 1863.


  • History 1
    • 1st Army of the Ohio 1.1
    • 2nd Army of the Ohio 1.2
  • Commanders 2
  • Major battles and campaigns 3
  • Orders of Battle 4
  • References 5
  • External links 6


1st Army of the Ohio

General Orders No. 97 appointed Grant's Army of the Tennessee at the Battle of Shiloh.

Buell was replaced as commander of the Department of the Ohio by Brig. Gen. Horatio G. Wright in August 1862, but because of Wright's junior rank, Maj. Gen. Henry W. Halleck ordered Thomas to replace Wright in command. However, Thomas foresaw a major battle and felt it unwise to change an army commander on the eve of battle. Thus Buell remained in command of the Army and Thomas was made his second-in-command.

The battle Thomas foresaw occurred on October 8, 1862, west of Perryville, Kentucky. Confederate General Braxton Bragg had marched into Kentucky to recruit soldiers and take the state from the Union. The full force of Buell's command was gathering when Bragg attacked. Known as the Battle of Perryville, or the Battle of Chandler Hills, casualties were very high on both sides.

Union casualties totaled 4,276 (894 killed, 2,911 wounded, 471 captured or missing). Confederate casualties were 3,401 (532 killed, 2,641 wounded, 228 captured or missing). [1] Although Union losses were higher, Bragg withdrew from Kentucky when the fighting was over, and therefore Perryville is considered a tactical victory for the Union.

Buell was subsequently relieved of all field command. Maj. Gen. William S. Rosecrans was appointed to command the Army of Ohio. He was also appointed to command of the Department of the Cumberland and subsequently renamed his forces the Army of the Cumberland.

2nd Army of the Ohio

Badge of the XXIII Corps.

On 25 March 1863, Maj. Gen. Knoxville, Tennessee. Here the IX Corps was added and the army grew to two corps, plus a division of cavalry. Burnside defeated the Confederates at the Battle of Fort Sanders in the Knoxville Campaign. After the battle, he asked to be relieved of command due to illness. Maj. Gen. John G. Foster replaced Burnside as commander of the Army and Department of the Ohio on December 9.

Foster's time in command of the Army was short. On February 9, 1864, Maj. Gen. Battle of Nashville. On February 9, 1865, Schofield was transferred to command the Department of North Carolina. When Schofield departed to assume departmental command, Maj. Gen. Jacob D. Cox temporarily assumed command of the Army.

The XXIII Corps was ordered to North Carolina and only Cox's division was present for the Battle of Wilmington. It was not until March 1865 that the rest of the XXIII Corps landed at New Bern, North Carolina. Upon the arrival of the XXIII Corps in its entirety, Schofield joined that corps with the X Corps under Maj. Gen. Alfred H. Terry to form the Army of the Ohio. The Army was designated the Center Wing of Maj. Gen. William T. Sherman's army and participated in the final stages of the Carolinas Campaign. With the close of the war, the troops were mustered out of military service. A number of post-war reunions were held by various elements of the old Army of the Ohio.


  • Maj. Gen. Don Carlos Buell (November 15, 1861 – October 24, 1862) also department commander until March 11
  • Maj. Gen. William S. Rosecrans (October 24 – October 30, 1862) became the Army of the Cumberland
  • Maj. Gen. Ambrose Burnside (March 25 – December 9, 1863) also department commander
  • Maj. Gen. John G. Foster (December 9, 1863 – February 9, 1864) also department commander
  • Maj. Gen. John M. Schofield (February 9 – September 14, 1864) also department commander
  • Maj. Gen. Jacob D. Cox (September 14 – October 22, 1864)
  • Maj. Gen. John M. Schofield (October 22, 1864 – February 2, 1865)
  • Maj. Gen. Jacob D. Cox (February 2 – February 9, 1865)
  • Maj. Gen. John M. Schofield (February 9 – March 31, 1865) also commander of the Department of North Carolina

Major battles and campaigns

Orders of Battle


1. Livermore, Thomas L., Numbers and Losses in the American Civil War 1861-1865, New York, 1901, p. 95, cited in McDonough, James Lee, War in Kentucky, University of Tennessee Press, 1994, pp 289–290. ISBN 0-87049-847-9. Noe, Kenneth W. Perryville: This Grand Havoc of Battle. Lexington: University Press of Kentucky, 2001. ISBN 978-0-8131-2209-0.


  • Army of the Ohio
  • Battle of Perryville

External links

  • Army Organization during the Civil War
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