The Fourth Alabama Painting by Don Troiani

Department of Pennsylvania

Army of Pennsylvania

MAJOR GENERAL R PATTERSON, Pennsylvania Volunteers
Major General R Patterson, Pennsylvania Volunteers, was assigned to command the Department of Pennsylvania, Headquarters at Philadelphia, Philadelphia County, Pennsylvania, by General Orders No.12, War Department, Adjutant General's Office, Washington, D. C., on 27 April, 1861, and was honourably discharged by General Orders No.46, Paragraph I, War Department, Adjutant General's Office, Washington, D. C., on 27 July, 1861, dated 19 July, 1861.

First Division

Brevet Major General & Brigadier General G Cadwalader, Pennsylvania Volunteers
Brevet Major General & Brigadier General G Cadwalader, Pennsylvania Volunteers, was honourably discharged by General Orders No.46, Paragraph I, War Department, Adjutant General's Office, Washington, D. C., on 19 July, 1861.

FIRST BRIGADE
Colonel G H Thomas, Second United States Cavalry

First Rhode Island Detached Militia; Sixth Pennsylvania Infantry; Twenty-first Pennsylvania Infantry; Twenty-third Pennsylvania Infantry; Doubleday's Battalion Infantry; Philadelphia City Cavalry, First Troop; Second United States Cavalry, Companies A, C, F, and K; First Rhode Island Detached Militia Artillery; Fourth United States Artillery, Light Company F

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THIRD BRIGADE
Brigadier General E C Williams, Pennsylvania Volunteers

Seventh Pennsylvania Infantry; Eighth Pennsylvania Infantry; Tenth Pennsylvania Infantry; Twentieth Pennsylvania Infantry

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FOURTH BRIGADE
Colonel D S Miles, Second United States Infantry

Ninth Pennsylvania Infantry; Thirteenth Pennsylvania Infantry; Sixteenth Pennsylvania Infantry; Third United States Infantry, Companies B, D, G, H, and K; Second United States Infantry, Companies C and K

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Second Division

Major General W H Keim, Pennsylvania Volunteers

SECOND BRIGADE
Brigadier General G C Wynkoop, Pennsylvania Volunteers

First Pennsylvania Infantry; Second Pennsylvania Infantry; Third Pennsylvania Infantry

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FIFTH BRIGADE
Brigadier General J S Negley, Pennsylvania Volunteers

Fourteenth Pennsylvania Infantry; Fifteenth Pennsylvania Infantry; Twenty-fourth Pennsylvania Infantry; Ninth New York State Militia, Company K

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SIXTH BRIGADE
Colonel J J Abercrombie, Seventh United States Infantry

Eleventh Pennsylvania Infantry, First Wisconsin Infantry, Fourth Connecticut Infantry, Eleventh Indiana Infantry, Second Massachusetts Infantry

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Third Division

Major General C W Sandford, New York State Militia

SEVENTH BRIGADE
Colonel C P Stone, Fourteenth United States Infantry

First New Hampshire Infantry; Ninth New York State Militia; Seventeenth Pennsylvania Infantry; Twenty-fifth Pennsylvania Infantry, Companies D, F, G, I, and K; Third District of Columbia Battalion Volunteers, detachment

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EIGHTH BRIGADE
Acting Brigadier General & Colonel D Butterfield, Twelfth New York State Militia

Nineteenth New York Infantry; Twenty-eighth New York Infantry; Fifth New York State Militia; Twelfth New York State Militia

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UNASSIGNED

Eleventh Indiana Infantry; Fifth Pennsylvania Reserve Infantry; Thirteenth Pennsylvania Reserve Infantry; Fifthteenth Pennsylvania Reserve Artillery

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