Army of the Potomac

Major General George B. McClellan

In July of 1862 the Ninth Army Corps was created and a cavalry division was formed.

Headquarters

Second Army Corps

Major General Edwin V. Sumner

1st Division

Brigadier General I. B. Richardson (to 7/17)
Brigadier General G. Stoneman (after 7/17)

2nd Division

Brigadier General J. Sedgwick

Third Army Corps

Major General Samuel P. Heintzelman

2nd Division

Brigadier General J. Hooker

3rd Division

Brigadier General P. Kearney

Fourth Army Corps

Brigadier General Erasmus Keyes

1st Division

Brigadier General D. N. Couch

2nd Division

Brigadier General J. J. Peck

Fifth Army Corps

Brigadier General Fitz John Porter

1st Division

Brigadier General G. W. Morrell

2nd Division

Brigadier General G. Sykes

3rd Division

Brigadier General T. Seymour

Sixth Army Corps

Major General William B. Franklin

1st Division

Brigadier General H. W, Slocum

2nd Division

Brigadier General W. F. Smith

Ninth Army Corps

Major General Ambrose E. Burnside

created 7/22

1st Division

Brigadier General I. I. Stevens

2nd Division

Major General J. Reno

3rd Division

Major General J. G. Parke

Cavalry Division

Brigadier General George Stoneman (to 7/17)

1st Brigade

Colonel W. W. Averill

2nd Brigade

Colonel D. M. Gregg (to 7/16)
Brigadier General A. Pleasonton (after 7/16)