United States Army


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Commanded by Major General George B. McClellan

On May 18, 1862, the Third and Fourth Corps gave up one of their three divisions to serve as the nucleus of a re-created Fifth Corps and a newly-created Sixth Corps.

Headquarters
Second Corps Brigadier General Edwin V. Sumner (to Maj. Gen. 5/5)
First Division Brigadier General Israel B. Richardson
Second Division Brigadier General John Sedgwick
Third Corps Brigadier General Samuel P. Heintzelman (to Maj. Gen. 5/5)
First Division Brigadier General Fitz John Porter to 5 Corps, 1 Div. (below)
Second Division Brigadier General Joseph Hooker
Third Division Brigadier General Philip Kearney
Fourth Corps Brigadier General Erasmus Keyes
First Division Brigadier General Darius N. Couch
Second Division Brigadier General William F. Smith to 6 Corps, 2 Div. (below)
Third Division Brigadier General Silas Casey
Fifth Corps Brigadier General Fitz John Porter recreated 5/18
First Division Brigadier General George W. Morrell (to 6/30) from 3 Corps, 1 Div. (above)
Second Division Brigadier General George Sykes
Artillery Reserve Colonel Henry J. Hunt from unattached (below)
Sixth Corps Major General William B. Franklin
First Division Brigadier General Henry Slocum from Dept. Rappahannock, 1 Div.
Second Division Brigadier General William F. Smith from 4 Corps, 2 Div. (above)
Cavalry Reserve Brigadier General Philip St. George Cooke
First Brigade Colonel William H. Emory
Second Brigade Colonel George A. H. Blake
Artillery Reserve Colonel Henry J. Hunt to 5th Corps (above)