June 1861 • to July >

Commanded by Brigadier General Samuel P. Heintzelman

Unattached
4th United States Cavalry, Cos. A&E Captain James B. McIntyre  from Ft. Leavenworth, Kansas
First Brigade Colonel W. B. Franklin
11th Massachusetts Infantry Regiment Colonel G. Clark from Massachusetts 6/26
4th Pennsylvania Infantry Regiment Colonel John Hartranft from Dept. Washington 6/3
5th Pennsylvania Infantry Regiment Colonel R. P. McDowell from Dept. Washington 6/3
1st United States Artillery, Battery I Captain J. B. Ricketts from Regular Army
Second Brigade Col. O. B. Wilcox
38th New York Infantry Regiment Colonel J. H. Ward from New York 6/19
1st Michigan Infantry Regiment Major A. F. Bidwell from Dist. Washington
4th Michigan Infantry Regiment Colonel D. A. Woodbury from Michigan 6/26
2nd United States Artillery, Battery D Captain R. Arnold from Regular Army
Third Brigade Col. O. O. Howard
3rd Maine Infantry Regiment Major H. G. Staples from Maine 6/4
4th Maine Infantry Regiment Colonel H. G. Berry from Maine 6/20
5th Maine Infantry Regiment Colonel M. H. Dunnell from Maine 6/26
2nd Vermont Infantry Regiment Colonel H. Whiting from Vermont 6/24