Williamsburg Union order of battle

The following United States Army units and commanders fought in the Battle of Williamsburg of the American Civil War. The Confederate order of battle is shown separately.

Abbreviations used

Military rank

• MG = Major General
• BG = Brigadier General
• Col = Colonel
• Ltc = Lieutenant Colonel
• Maj = Major
• Cpt = Captain
• Lt = Lieutenant
• Bvt = Brevet

Other

• w = wounded
• mw = mortally wounded
• k = killed

Army of the Potomac

MG George B. McClellan
Commanding in the field: BG Edwin V. Sumner

III Corps

BG Samuel P. Heintzelman

Division	Brigade	Regiments and Others
Second Division      BG Joseph Hooker	First Brigade    BG Cuvier Grover	2nd New Hampshire 1st Massachusetts 11th Massachusetts 26th Pennsylvania
	Second Brigade    Col Nelson Taylor	70th New York 72nd New York 73rd New York 74th New York
	Third Brigade    BG Francis E. Patterson	5th New Jersey 6th New Jersey 7th New Jersey 8th New Jersey
	Artillery    Maj Charles S. Wainwright	Battery D, 1st New York 4th New York 6th New York Battery H, 1st United States
Third Division      BG Philip Kearny	First Brigade    BG Charles Davis Jameson	57th Pennsylvania 63rd Pennsylvania 105th Pennsylvania 87th New York
	Second Brigade    BG David B. Birney	38th New York 40th New York 3rd Maine 4th Maine
	Third Brigade    BG Hiram G. Berry	2nd Michigan 3rd Michigan 5th Michigan 37th New York

IV Corps

BG Erasmus D. Keyes

Division	Brigade	Regiments and Others
First Division      BG Darius N. Couch	First Brigade    BG Charles Devens	7th Massachusetts 10th Massachusetts 2nd Rhode Island 36th New York
	Second Brigade    BG Lawrence P. Graham	23rd Pennsylvania 31st Pennsylvania 61st Pennsylvania 65th New York 67th New York
	Third Brigade    BG John J. Peck	55th New York 62nd New York 93rd Pennsylvania 98th Pennsylvania 102nd Pennsylvania
Second Division      BG William F. Smith	First Brigade    BG Winfield S. Hancock	5th Wisconsin 6th Maine 43rd New York 49th New York
	Second Brigade    BG William T. H. Brooks	2nd Vermont 3rd Vermont 4th Vermont 5th Vermont 6th Vermont
	Third Brigade    BG John Davidson	7th Maine 33rd New York 49th New York 77th New York
Third Division      BG Silas Casey	First Brigade    BG Henry Morris Naglee	52nd Pennsylvania 104th Pennsylvania 56th New York 100th New York 11th Maine
	Second Brigade    BG William H. Keim	96th New York 85th Pennsylvania 101st Pennsylvania 103rd Pennsylvania
	Third Brigade    BG Innis N. Palmer	81st New York 85th New York 92nd New York 93rd New York 98th New York

Cavalry Advanced Guard

BG George Stoneman

Brigade	Regiments and Others
Cavalry Division      BG Philip St. George Cooke	1st United States Cavalry 6th United States Cavalry
First Brigade    BG William H. Emory	3rd Pennsylvania 8th Illinois
Artillery    Ltc William Hays	Battery M, 2nd United States: Cpt H. Benson Battery C, 3rd United States: Cpt H. Gibson

References

• Hastings, Earl C. and David S. Hastings. A Pitiless Rain: The Battle of Williamsburg, 1862. Shippensburg, Pennsylvania; White Mane Publishing Company, 1997. ISBN 1-57249-042-X