Second Petersburg Union order of battle
Division Brigade Regiments and Others
First Division BG Charles Griffin 1st Brigade Col Joshua L. Chamberlain ( w ) June 18 Col William S. Tilton 121st Pennsylvania 142nd Pennsylvania 143rd Pennsylvania 149th Pennsylvania 150th Pennsylvania 187th Pennsylvania
First Division BG Charles Griffin 2nd Brigade Col Jacob B. Sweitzer 22nd Massachusetts 32nd Massachusetts : Col George L. Prescott ( mw ) 4th Michigan 62nd Pennsylvania 91st Pennsylvania 155th Pennsylvania 21st Pennsylvania Cavalry
First Division BG Charles Griffin 3rd Brigade BG Joseph J. Bartlett 20th Maine 18th Massachusetts 1st Michigan 16th Michigan 44th New York 83rd Pennsylvania 118th Pennsylvania
Second Division BG Romeyn B. Ayres 1st Brigade Col Edgar M. Gregory 5th New York 140th New York 146th New York 4th U.S. Infantry Detachment , 10th U.S. Infantry Detachment , 11th U.S. Infantry 12th U.S. Infantry 14th U.S. Infantry 17th U.S. Infantry
Second Division BG Romeyn B. Ayres 2nd Brigade Col Nathan T. Dushane 1st Maryland 4th Maryland 7th Maryland 8th Maryland Purnell ( Maryland ) Legion
Second Division BG Romeyn B. Ayres 3rd Brigade Col J. Howard Kitching 6th New York Heavy Artillery Battery M , 15th New York Heavy Artillery : Cpt William D. Dickey ( w )
Third Division BG Samuel W. Crawford 1st Brigade Col Peter Lyle 16th Maine 13th Massachusetts 39th Massachusetts 104th New York 90th Pennsylvania 107th Pennsylvania
Third Division BG Samuel W. Crawford 2nd Brigade Col James L. Bates 12th Massachusetts 94th New York 97th New York 11th Pennsylvania 88th Pennsylvania
Third Division BG Samuel W. Crawford 3rd Brigade Col James Carle 190th Pennsylvania 191st Pennsylvania
Fourth Division BG Lysander Cutler 1st Brigade ( Iron Brigade ) BG Edward S. Bragg 7th Indiana 19th Indiana 24th Michigan 1st Battalion , New York Sharpshooters 6th Wisconsin 7th Wisconsin
Fourth Division BG Lysander Cutler 2nd Brigade Col J. William Hofmann 3rd Delaware 4th Delaware 76th New York 95th New York 147th New York 56th Pennsylvania 157th Pennsylvania
Fourth Division BG Lysander Cutler Artillery Brigade Col Charles S. Wainwright 3rd Massachusetts Light 5th Battery , Massachusetts Light 9th Battery , Massachusetts Light Battery B , 1st New York Light Battery C , 1st New York Light Battery D , 1st New York Light Battery E & Battery L , 1st New York Light Battery H , 1st New York Light 5th Battery , New York Light 15th Battery , New York Light Battery B , 1st Pennsylvania Light Battery B , 4th United States Battery D , 5th United States
General in Chief -- Army of the Potomac
MG Gouverneur K. Warren 12th New York Battalion
The following Union Army units and commanders fought in the Second Battle of Petersburg (June 15-18, 1864) of the American Civil War. Order of battle compiled from the casualty returns. The Confederate order of battle is listed separately.