United States Armies in the East > Department of Pennsylvania
< to May • June 1861 • to July >
Commanded by Major General Robert Patterson
1st Division |
Brigadier General George Cadwallader | created 6/1 |
| 1st Brigade | Colonel George H. Thomas (to 6/17) Colonel Charles P. Dare |
|
| 6th Pennsylvania Infantry Regiment | Colonel James Nagle | |
| 21st Pennsylvania Infantry Regiment | Colonel John F. Ballier | |
| 23rd Pennsylvania Infantry Regiment | Colonel Charles P. Dare (^ 6/17) | |
| Philadelphia City Troop Cavalry | Captain Thomas James | |
| 2nd United States Cavalry (Cos. A,CF&K) | ||
| 4th U.S. Artillery (detatchment) | Captain Abner Doubleday | 1 8″ howitzer and 1 24-pounder |
| 3rd Brigade | Brigadier General Alpheus S. Williams | created 6/1 |
| 7th Pennsylvania Infantry Regiment | Colonel William I. Irwin | from unattached |
| 8th Pennsylvania Infantry Regiment | Colonel A.H. Emley | from unattached |
| 10th Pennsylvania Infantry Regiment | Colonel Sullivan A. Meredith | from unattached |
| 20th Pennsylvania Infantry Regiment | Colonel Wiliam H. Gray | from unattached |
| 4th Brigade | Colonel Dixon S. Miles (to 6/17) Colonel J. C. Longenecker |
created 6/1 |
| 9th Pennsylvania Infantry Regiment | Colonel Henry C. Longnecker | from Delaware 6/6 |
| 13th Pennsylvania Infantry Regiment | Colonel Thomas A. Rowley | from Harrisburg 6/4 |
| 16th Pennsylvania Infantry Regiment | Colonel Thomas A. Ziegle | from Harrisburg 6/3 |
| United States Regulars detachments | Major O.L. Sheppard | to Washington 6/17 |
2nd Division |
Major General William H. Keim | created 6/1 |
| 2nd Brigade | Brigadier General George C. Wynkoop | |
| 1st Pennsylvania Infantry Regiment | Colonel Samuel Yohe | from Dept. Annapolis 6/3 |
| 2nd Pennsylvania Infantry Regiment | Colonel Frederick S. Stumbaugh | from York 6/1 |
| 3rd Pennsylvania Infantry Regiment | Colonel Francis P. Minier | from York 5/28 |
| 5th Brigade | Brigadier General J. S. Negley | |
| 11th Pennsylvania Infantry Regiment | Colonel Pharon Jarrett | from West Chester 6/18 to 6th Brigade 6/20 (below) |
| 14th Pennsylvania Infantry Regiment | Colonel John W. Johnston | from Lancaster 6/3 |
| 15th Pennsylvania Infantry Regiment | Colonel R.A. Oakford | from Lancaster 6/3 |
| 24th Pennsylvania Infantry Regiment | Colonel Joshua T. Owen | from Philadelphia 6/3 |
| 6th Brigade | Colonel John J. Abercrombie | |
| 4th Connecticut Infantry Regiment | Colonel Levi Woodhouse | from Washington early June |
| 11th Pennsylvania Infantry Regiment | Colonel Pharon Jarrett | from 5th Brigade 6/20 (above) |
| 1st Wisconsin Infantry Regiment | Colonel Starkweather | from Harrisburg early June |
Artillery |
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| 1st United States Artillery, Battery E | from Fort Hamilton, New York 6/3 | |
| 1st United States Artillery, Battery H | from Fort Hamilton, New York 6/3 | |
Unattached |
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| 17th Pennsylvania Infantry Regiment | Colonel Francis E. Patterson | at Rockville and Edward’s Ferry |