# Battle of Pea Ridge order of battle: Union

The following Union Army units and commanders fought in the Battle of Pea Ridge. The Pea Ridge Confederate order of battle is shown separately.

## Abbreviations used
### Military rank

* BG = Brigadier General
* Col = Colonel
* Ltc = Lieutenant Colonel
* Maj = Major
* Cpt = Captain
* Lt = 1st Lieutenant

### Other

* k = killed
* w = wounded
* c = captured

## Army of the Southwest
### Army Headquarters

BG Samuel R. Curtis
Units attached to Army Headquarters :
| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
| Headquarters | Not Brigaded | 24th Missouri Volunteer Infantry Companies A, B, F, H, I | Maj Eli W. Weston | 3 | 16 | 7 | 26 |
| Headquarters | Not Brigaded | 3rd Regiment Iowa Volunteer Cavalry Companies A, B, C, D, M | Col Cyrus Bussey | 24 | 17 | 9 | 50 |
| Headquarters | Not Brigaded | Bowen’s Missouri Cavalry Battalion, 4 companies 4 12-pounder mountain howitzers | Maj William D. Bowen | 1 | 3 | 2 | 6 |

### First and Second Divisions

BG Franz Sigel
1st and 2nd Divisions: Franz Sigel :
| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
| First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 25th Illinois Volunteer Infantry Regiment | Col William N. Coler | 3 | 18 | 3 | 24 |
| First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 44th Illinois Volunteer Infantry Regiment | Col Charles Knobelsdorff | 1 | 2 | 0 | 3 |
| First Division Col Peter J. Osterhaus | First Brigade Col Peter J. Osterhaus | 17th Missouri Volunteer Infantry, Company A detached | Maj August H. Poten | 0 | 2 | 8 | 10 |
| First Division Col Peter J. Osterhaus | Second Brigade Col Nicholas Greusel | 36th Illinois Volunteer Infantry Regiment Company F detached | Col Nicholas Greusel | 4 | 37 | 34 | 75 |
| First Division Col Peter J. Osterhaus | Second Brigade Col Nicholas Greusel | 12th Missouri Volunteer Infantry, Company E detached | Maj Hugo Wangelin | 3 | 29 | 2 | 34 |
| First Division Col Peter J. Osterhaus | Artillery | 4th Independent Battery, Ohio Light Artillery 4 rifled 6-pounder guns & 2 12-pounder howitzers | Cpt Louis Hoffman | 1 | 4 | 0 | 5 |
| First Division Col Peter J. Osterhaus | Artillery | Welfley’s Independent Battery, Missouri Light Artillery 3 12-pounder howitzers & 2 12-pounder Napoleons | Cpt Martin Welfley | 0 | 5 | 0 | 5 |
| Second Division   BG Alexander Asboth (w) | First Brigade   Col Frederick Schaefer | 2nd Missouri Volunteer Infantry | Ltc Bernard Laiboldt | 8 | 34 | 12 | 54 |
| Second Division   BG Alexander Asboth (w) | First Brigade   Col Frederick Schaefer | 15th Missouri Volunteer Infantry, Company B detached | Col Francis J. Joliat | 0 | 0 | 11 | 11 |
| Second Division   BG Alexander Asboth (w) | Not Brigaded | 3rd Missouri Volunteer Infantry, Companies B, C, E | Maj Joseph Conrad | 0 | 0 | 0 | 0 |
| Second Division   BG Alexander Asboth (w) | Not Brigaded | 4th Missouri Volunteer Cavalry Companies A, C, D, E, F, I | Maj Emeric Meszaros | 5 | 8 | 3 | 16 |
| Second Division   BG Alexander Asboth (w) | Not Brigaded | 5th Missouri Volunteer Cavalry | Col Joseph Nemett | 3 | 11 | 3 | 17 |
| Second Division   BG Alexander Asboth (w) | Artillery | 1st Missouri Flying Artillery Battery 4 rifled 6-pounder guns & 2 12-pounder howitzers | Cpt Gustavus M. Elbert | 3 | 8 | 8 | 19 |
| Second Division   BG Alexander Asboth (w) | Artillery | 2nd Independent Battery, Ohio Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Lt William B. Chapman | 1 | 2 | 0 | 3 |

### Third and Fourth Divisions

3rd and 4th Divisions: Independent :
| Division | Brigade | Unit | Commander | Killed | Wounded | Missing | Casualties |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 8th Indiana Infantry Regiment | Col William P. Benton | 5 | 27 | 0 | 32 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 18th Indiana Infantry Regiment | Ltc Henry D. Washburn | 3 | 23 | 0 | 26 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 22d Indiana Infantry Regiment Company B detached | Ltc John A. Hendricks (k) Maj David W. Daily, Jr. | 9 | 33 | 0 | 42 |
| Third Division Col Jefferson C. Davis | First Brigade Col Thomas Pattison | 1st Battery, Indiana Light Artillery 4 rifled 6-pounder guns & 2 6-pounder guns | Cpt Martin Klauss | 0 | 5 | 6 | 11 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | 37th Illinois Volunteer Infantry Regiment | Ltc Myron Barnes | 20 | 121 | 3 | 144 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | 59th Illinois Volunteer Infantry Regiment | Ltc Calvin H. Frederick | 9 | 57 | 0 | 66 |
| Third Division Col Jefferson C. Davis | Second Brigade Col Julius White | Battery A, 2d Illinois Light Artillery 2 rifled 6-pounder guns & 2 6-pounder guns & 2 12-pounder howitzers | Cpt Peter Davidson | 0 | 17 | 0 | 17 |
| Third Division Col Jefferson C. Davis | Not Brigaded | 1st Missouri Volunteer Cavalry Regiment Companies B, F, G, H, I, K, L, M | Col Calvin A. Ellis | 2 | 2 | 2 | 6 |
| Fourth Division Col Eugene A. Carr (w) | First Brigade Col Grenville M. Dodge (w) | 4th Iowa Volunteer Infantry Regiment | Ltc John Galligan (w) | 18 | 139 | 3 | 160 |
| Fourth Division Col Eugene A. Carr (w) | First Brigade Col Grenville M. Dodge (w) | 35th Illinois Volunteer Infantry Regiment | Col Gustavus A. Smith (w) Ltc William P. Chandler (w) | 14 | 47 | 52 | 113 |
| Fourth Division Col Eugene A. Carr (w) | First Brigade Col Grenville M. Dodge (w) | 3rd Illinois Volunteer Cavalry Regiment | Maj John McConnell | 9 | 36 | 13 | 58 |
| Fourth Division Col Eugene A. Carr (w) | First Brigade Col Grenville M. Dodge (w) | 1st Independent Battery, Iowa Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Cpt Junius A. Jones (w) Lt Virgil A. David | 3 | 14 | 0 | 17 |
| Fourth Division Col Eugene A. Carr (w) | Second Brigade Col William Vandever | 9th Iowa Volunteer Infantry Regiment | Ltc Francis J. Herron (w/c) Maj William H. Coyl (w) | 38 | 176 | 4 | 218 |
| Fourth Division Col Eugene A. Carr (w) | Second Brigade Col William Vandever | Phelp's Independent Infantry Regiment | Col John S. Phelps (w) | 12 | 71 | 11 | 94 |
| Fourth Division Col Eugene A. Carr (w) | Second Brigade Col William Vandever | 3d Independent Battery, Iowa Light Artillery 4 6-pounder guns & 2 12-pounder howitzers | Cpt Mortimer M. Hayden | 2 | 17 | 3 | 22 |