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Commanded by Major General John Dix
Created on March 22, 1862, to consist of New Jersey, Pennsylvania, Delaware and the Eastern Shore of Maryland and Virginia along with the counties of Cecil, Harford, Baltimore and Ann Arundel in Maryland. Almost all of the troops were from Dix’s Command of the Army of the Potomac.
Infantry |
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| 2nd Delaware Infantry Regiment | Colonel W. Henry Wharton | |
| 10th Maine Infantry Regiment | Colonel George L. Beale | to Railroad Brig. (below) |
| 1st Maryland Eastern Shore Regiment | Colonel James Wallace | to District Eastern Shore (below) |
| 2nd Maryland Eastern Shore Regiment | Colonel Edward Wilkins | to District Eastern Shore (below) |
| 2nd Maryland Infantry Regiment | Colonel John Sommer | |
| 3rd Maryland Infantry Regiment | Colonel John C. McConnell | |
| Patapsco Maryland Guard | Colonel James W. McMillan | to Railroad Brig. (below) |
| Baltimore Maryland Light Guard | ||
| Purnell Legion (Maryland) | to District Eastern Shore (below) | |
| 17th Massachusetts Infantry Regiment | Colonel Thomas I.C. Amory | to Foster’s 1 Brigade, Burnside’s Expeditionary Corps |
| 3rd New York Infantry Regiment | Colonel Samuel M. Alford | |
| 4th New York Infantry Regiment | Colonel Alfred W. Taylor | |
| 5th New York Infantry Regiment | Colonel Abram Duryea (to BG 9/10) Colonel Gouverneur K. Warren |
to Sykes’ Infantry Reserve, Army Potomac |
| 60th New York Infantry Regiment | Colonel William B. Hayward | to Railroad Brig. (below) |
| 11th Pennsylvania Infantry Regiment | Colonel Richard Coulter | |
| 87th Pennsylvania Infantry Regiment | Colonel George Hay | |
Artillery |
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| Battery A, Maryland Light Artillery | ||
| Battery B, Maryland Light Artillery | ||
| Battery L, 1st New York Light Artillery | ||
| 2nd United States Artillery, Battery I | at Fort McHenry | |
Cavalry |
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| 1st Maryland Cavalry Regiment | Colonel Andrew G. Miller | |
| Purnell Legion Cavalry (Maryland) | ||
| 5th New York Cavalry Regiment | Colonel DeForest Othneil | to 5th Corps 3/31 |
| 10th New York Cavalry Regiment | Colonel John C. Lemmon | from duty at Gettysburg |
District of the Eastern Shore |
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| 1st Maryland Eastern Shore Regiment | Colonel James Wallace | from Unattached Infantry (above) |
| 2nd Maryland Eastern Shore Regiment | Colonel Edward Wilkins | from Unattached Infantry (above) |
| Purnell Legion Infantry (Maryland) | Colonel William J. Leonard (after 3/17) | from Unattached Infantry (above) |
Railroad Brigade |
Colonel Dixon S. Miles | |
| 1st Maryland Potomac Home Brig. | Colonel William P. Maulsby | from Dept. Shenandoah, Banks’ Div. |
| 4th Maryland Potomac Home Bde. | Colonel William J.L. Nicodemus | from Dept. Shenandoah, Banks’ Div. |
| Patapsco Maryland Guard | Colonel James W. McMillan | from Unattached Infantry (above) |
| 10th Maine Infantry Regiment | Colonel DeForest Othneil | from Unattached Infantry (above) |
| 60th New York Infantry Regiment | Colonel William B. Hayward | from Unattached Infantry (above) |
| 54th Pennsylvania Infantry Regiment | Colonel Jacob M. Campbell | from Defenses of Washington |