Command History
| Ambrose E. Burnside | Army of the Potomac | July 22, 1862 – August 3, 1862 |
| Ambrose E. Burnside | Department of Virginia | August 3, 1862 – September 3, 1862 |
| Jesse L. Reno | Army of the Potomac | September 3, 1862 – September 14, 1862 |
| Jacob D. Cox | Army of the Potomac | September 14, 1862 – October 8, 1862 |
| Orlando B. Willcox | Army of the Potomac | October 8, 1862 – January 16, 1863 |
| John Sedgwick | Army of the Potomac | January 16, 1863 – February 5, 1863 |
| William F. Smith | Department of Virginia | February 5, 1863 – March 8, 1863 |
| Orlando B. Willcox | Department of Virginia | March 8, 1863 – March 17, 1863 |
| Ambrose E. Burnside | Department of the Ohio | March 17, 1863 – March 19, 1863 |
| John G. Parke | Department of the Ohio | March 19, 1863 – April 4, 1863 |
| Orlando B. Willcox | Department of the Ohio | April 4, 1863 – June 5, 1863 |
| John G. Parke | Department of the Tennessee | June 5, 1863 – August 25, 1863 |
| Robert B. Potter | Army of the Ohio | August 25, 1863 – September 15, 1863 |
| John G. Parke | Army of the Ohio | September 15, 1863 – September 17, 1863 |
| Ambrose E. Burnside | Army of the Ohio | September 17, 1863 – December 9, 1863 |
| John G. Foster | Army of the Ohio | December 9, 1863 – January 17, 1864 |
| Orlando B. Willcox | Army of the Ohio | January 17, 1864 – January 26, 1864 |
| John G. Parke | Army of the Ohio | January 26, 1864 – March 16, 1864 |
| Orlando B. Willcox | Army of the Ohio | March 16, 1864 – April 13, 1864 |
| Ambrose E. Burnside | Army of the Ohio | April 13, 1864 – May 24, 1864 |
| Ambrose E. Burnside | independent command, reporting directly to Gen. Grant | May 24, 1864 – August 22, 1864 |
| John G. Parke | Army of the Potomac | August 22, 1864 – September 1, 1864 |
| Orlando B. Willcox | Army of the Potomac | September 1, 1864 – September 10, 1864 |
| John G. Parke | Army of the Potomac | September 10, 1864 – December 31, 1864 |
| Orlando B. Willcox | Army of the Potomac | December 31, 1864 – January 12, 1865 |
| John G. Parke | Army of the Potomac | January 12, 1865 – January 24, 1865 |
| Orlando B. Willcox | Army of the Potomac | January 24, 1865 – February 2, 1865 |
| John G. Parke | Army of the Potomac | February 2, 1865 – April 24, 1865 |
| John G. Parke | Department of Washington | April 24, 1865 – June 7, 1865 |
| Orlando B. Willcox | Department of Washington | June 7, 1865 – June 26, 1865 |
| John G. Parke | Department of Washington | June 26, 1865 – July 27, 1865 |
Read more about this topic: IX Corps (Union Army)
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