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Commanded by Major General John C. Fremont
| Headquarters | ||
| Stewart’s Independent Cavalry Co. | ||
| Bracken’s Independent Cavalry Co. | ||
| Unattached | ||
| 6th Ohio Cavalry Regiment | Colonel William R. Lloyd | from Ohio |
| 3rd West Virginia Cavalry Regiment | ||
| Milroy’s Independent Brigade | Brig. Gen. Robert H. Milroy | |
| 25th Ohio Infantry Regiment | Colonel James A. Jones (res. 5/16) Colonel William P. Richardson |
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| 2nd West Virginia Infantry Regiment | Colonel John W. Moss (5/20) Colonel George R. Latham |
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| 3rd West Virginia Infantry Regiment | Colonel David T. Hewes | |
| 5th West Virginia Infantry Regiment | Colonel John L. Zeigler | |
| 1st Ohio Artillery, Battery I | ||
| 12th Ohio Independent Battery | ||
| 1st West Virginia Cavalry (4 cos.) | Colonel Henry Anisansel | |
| Schenk’s Independent Brigade | Brig. Gen. Robert C. Schenck | created 4/19 |
| 32nd Ohio Infantry Regiment | Colonel Thomas H. Ford | |
| 55th Ohio Infantry Regiment | Colonel John C. Lee | |
| 73rd Ohio Infantry Regiment | Colonel Orland Smith | |
| 75th Ohio Infantry Regiment | Colonel Nathaniel C. McLean | |
| 82nd Ohio Infantry Regiment | Colonel James Cantwell | |
| Rigby’s Indiana Battery | ||
| 1st Ohio Artillery, Battery K | ||
| 1st Connecticut Cavalry | ||
| Railroad District | Brig. Gen. Benjamin F. Kelly | |
| 3rd Maryland Potomac Home Brigade | ||
| 6th West Virginia Infantry Regiment | Colonel Nathan Wilkinson | |
| 10th West Virginia Infantry Regiment | Colonel Thomas M. Harris | |
| 11th West Virginia Infantry Regiment | Colonel John C. Rathbone | |
| 1st Connecticut Cavalry | to Schenk’s Ind. Brig. (above) | |
| 1st Illinois Artillery, Battery L | ||
| 1st West Virginia, Battery C | mustered in at Wheeling | |
| Ringgold (PA) Cavalry Co. | from Hatch’s Brig. 5th Corps | |
| Washington (PA) Cavalry Co. | from Hatch’s Brig. 5th Corps | |
| Advanced Brigade | Colonel A. Cluserett | |
| 60th Ohio Infantry Regiment | Colonel William H. Trimble | from District Kanawha |
| 8th West Virginia Infantry Regiment | Colonel David H. Strother | from District Kanawha |
| 4th New York Cavalry Regiment | Colonel Christian F. Dickel | from 2nd Corps April 1 |
| District of the Kanawha | Brig. Gen. Jacob D. Cox | |
| 1st Brigade | Colonel Eliakim Scammon | |
| 2nd Brigade | Colonel August Moor | |
| 3rd Brigade | Colonel George Crook | |
| 4th Brigade | Colonel Joseph A.J. Lightburn | |
| Blenker’s Division | Brig. Gen. Louis Blenker | |
| 1st Brigade | Brig. Gen. Julius H. Stahel | |
| 2nd Brigade | Brig. Gen. Adolph Von Steinwehr | |
| 3rd Brigade | Brig. Gen. Henry Bohlen | |