United States Armies in the EastDepartment of Pennsylvania


< to May • June 1861 • to July >

Commanded by Major General Robert Patterson

Unattached
2nd Pennsylvania Infantry Regiment Colonel Frederick S. Stumbaugh to 2 Brig. 2 Div. (below)
3rd Pennsylvania Infantry Regiment Colonel Francis P. Minier to 2 Brig. 2 Div. (below) 6/1
7th Pennsylvania Infantry Regiment Colonel William I. Irwin to 3 Brig. 1 Div. (below) 6/14
8th Pennsylvania Infantry Regiment Colonel A.H. Emley to 3 Brig. 1 Div. (below) 6/14
10th Pennsylvania Infantry Regiment Colonel Sullivan A. Meredith to 3 Brig. 1 Div. (below) 6/16
13th Pennsylvania Infantry Regiment Colonel Thomas A. Rowley to 4 Brig. 1 Div. (below) 6/4
14th Pennsylvania Infantry Regiment Colonel John W. Johnston to 5 Brig. 2 Div. (below) 6/3
17th Pennsylvania Infantry Regiment Colonel Francis E. Patterson at Rockville and Edward’s Ferry
20th Pennsylvania Infantry Regiment Colonel Wiliam H. Gray to 3rd Brig. 1 Div. 6/1
1st Division Brig. Gen. George Cadwallader  created 6/1
1st Brigade Col. George H. Thomas
3rd Brigade Brig. Gen. A. S. Williams
4th Brigade Col. J. C. Longenecker
2nd Division Maj. Gen. William H. Keim  created 6/1
2nd Brigade Brig. Gen. G. C. Wynkoop
5th Brigade Brig. Gen. J. S. Negley
6th Brigade Col. John J. Abercrombie
Unattached
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