Editing First Battle of Bull Run (section)

==Opposing forces==

===Union===
{{further|First Bull Run Union order of battle|l1=Union order of battle}}
{| class="wikitable floatright"
!bgcolor="#99ccff"|Key Union Generals
|-
|<gallery mode="packed" heights="160" style="text-align:center; margin: 0px;">
File:Portrait of Maj. Gen. Irvin McDowell, officer of the Federal Army.jpg|Brig. Gen.<br />[[Irvin McDowell]], ('''Commanding''')
File:General Daniel Tyler USA.jpg|Brig. Gen.<br />[[Daniel Tyler]]
File:David Hunter.jpg|Brig. Gen.<br />[[David Hunter]]
File:Samuel P. Heintzelman - Brady-Handy.jpg|Brig. Gen.<br />[[Samuel P. Heintzelman]]
</gallery>
<gallery mode="packed" heights="160" style="text-align:center; margin: 0px;">

File:Theodore Runyon cph.3a03195.jpg|Brig. Gen.<br />[[Theodore Runyon]]
File:Dixon S. Miles.jpg|Col.<br />[[Dixon S. Miles]]
File:Robert Patterson.jpg|Maj. Gen.<br />[[Robert Patterson]]
</gallery>
|}
[[Irvin McDowell|McDowell]]'s [[Army of Northeastern Virginia]] was organized into five infantry divisions of three to five brigades each. Each brigade contained three to five infantry regiments. An artillery battery was generally assigned to each brigade. The total
number of Union troops present at the First Battle of Bull Run was about
35,000 although only about 18,000 were actually engaged.
The Union army was organized as follows:
*1st Division of Brig. Gen. [[Daniel Tyler]] the largest in the army, contained four brigades, led by Brig. Gen. [[Robert C. Schenck]], Col. [[Erasmus D. Keyes]], Col. [[William T. Sherman]], and Col. [[Israel B. Richardson]];
*2nd Division of Col. [[David Hunter]] of two brigades. These were led by Cols. [[Andrew Porter (Civil War general)|Andrew Porter]] and [[Ambrose E. Burnside]];
*3rd Division of Col. [[Samuel P. Heintzelman]] included three brigades, led by Cols. [[William B. Franklin]], [[Orlando B. Willcox]], and [[Oliver O. Howard]];
*4th Division of Brig. Gen. [[Theodore Runyon]] without brigade organization and ''not engaged'', contained seven regiments of New Jersey and one regiment of New York volunteer infantries;
*5th Division of Col. [[Dixon S. Miles]] included two brigades, commanded by Cols. [[Louis Blenker]] and [[Thomas A. Davies]];
While McDowell organized the Army of Northeastern Virginia, a smaller Union command was organized and stationed northwest of Washington, near Harper's Ferry. Commanded by Maj. Gen. [[Robert Patterson]], 18,000 men of the Department of Pennsylvania protected against a Confederate incursion from the Shenandoah Valley.

''Abstract from the returns of the Department of Northeastern Virginia, commanded by Brigadier-General McDowell, U.S.A., for July 16 and 17, 1861.''<ref name=UFS/>
{| class="wikitable plainrowheaders"
|+ <u>ARMY OF NORTHEASTERN VIRGINIA</u>
|-
! rowspan="3" | Commands
! colspan="4" | Present
|-
! colspan="2" | For duty
! rowspan="2" | Total
! rowspan="2" | Aggregate
|-
! Officers
! Men
|-
! scope=row | General staff
| 19||||||21
|-
! scope=row | First (Tyler's) Division
| 569||12,226||9,494||9,936
|-
! scope=row | Second (Hunter's) Division
| 121||2,364||2,525||2,648
|-
! scope=row | Third (Heintzelman's) Division
| 382||8,680||9,385||9,777
|-
! scope=row | Fourth (Runyon's) Division
| 247||5,201||5,502||5,752
|-
! scope=row | Fifth (Miles') Division
| 289||5,884||5,917||6,207
|-
! scope=row | [[21st New York Infantry Regiment|Twenty-first New York Volunteers]]
| 37||684||707||745
|-
! scope=row | Twenty-fifth New York Militia
| 39||519||534||573
|-
! scope=row | Second United States Cavalry, Company E
| 4||56||63||73
|-
! Total
| 1,707|| 35,614||34,127|| 35,732
|}

''Abstract from return of the Department of Pennsylvania, commanded by Major-General Patterson, June 28, 1861.''<ref>''Further information:'' Official Records, Series I, Volume II [http://ebooks.library.cornell.edu/cgi/t/text/pageviewer-idx?c=moawar&cc=moawar&idno=waro0002&node=waro0002%3A6&view=image&seq=203&size=100 p. 187] {{Webarchive|url=https://web.archive.org/web/20230322015618/https://guides.library.cornell.edu/ebooksatCUL |date=March 22, 2023 }}.</ref>
{| class="wikitable plainrowheaders"
|+ <u>PATTERSON'S COMMAND</u>
|-
! rowspan="3" | Commanding officer
! rowspan="3" | Troops
! colspan="6" | Present for duty
|-
! colspan="2" | Infantry
! colspan="2" | Cavalry
! colspan="2" |Artillery
|-
! Officers
! Men
! Officers
! Men
! Officers
! Men
|-
! scope=row | Bvt. Maj. Gen. [[George Cadwalader]] !! scope=row |First division
| 322||6,637||11||307||7||251
|-
! scope=row | Maj. Gen. [[William H. Keim]] !! scope=row |Second division
| 322||6,410||3||74||||
|-
! !! Total
| 644|| 13,047 || 14 || 381 || 7 || 251
|}
{| class="wikitable plainrowheaders" style="min-width:22em"
|+ Aggregate present for duty
|-
! scope=row | Infantry
| 13,691
|-
! scope=row | Cavalry
| 395
|-
! scope=row | Artillery
| 258
|-
! Total
| 14,344
|}

===Confederate===
{{further|First Bull Run Confederate order of battle|l1=Confederate order of battle}}
{| class="wikitable floatright"
|-
!bgcolor="#c0c0c0"|Key Confederate Generals
|-
|<gallery mode="packed" heights="160" style="text-align:center; margin: 0px;">
File:Pgt beauregard.jpg|Brig. Gen.<br />[[P. G. T. Beauregard]], '''Army of the Potomac'''
File:Joseph Johnston.jpg|Brig. Gen.<br />[[Joseph E. Johnston]], '''Army of the Shenandoah'''
</gallery>
|}

*The '''[[Confederate Army of the Potomac|Army of the Potomac]]''' (Brig. Gen. P.{{nbsp}}G.{{nbsp}}T.{{nbsp}}Beauregard, commanding) was organized into six infantry brigades, with each brigade containing three to six infantry regiments. Artillery batteries were assigned to various infantry brigades. The total number of troops in the Confederate Army of the Potomac was approximately 22,000. Beauregard's army also contained thirty-nine pieces of field artillery and a regiment of Virginia cavalry. The Army of the Potomac was organized into seven infantry brigades. These were:
**1st Brigade, under Brig. Gen. [[Milledge Luke Bonham]];
**2nd Brigade, under Brig. Gen. [[Richard S. Ewell]];
**3rd Brigade, under Brig. Gen. [[David Rumph Jones|David R. Jones]];
**4th Brigade, under Brig. Gen. [[James Longstreet]];
**5th Brigade, under Col. [[Philip St. George Cocke]];
**6th Brigade, under Col. [[Jubal Early]];
**7th Brigade, under Col. [[Nathan G. Evans]].
**Reserve Brigade, under Brig. Gen. [[Theophilus H. Holmes]]
*The '''[[Confederate Army of the Shenandoah|Army of the Shenandoah]]''' (Brig. Gen. Joseph E. Johnston, commanding) was also organized into brigades. It consisted of four brigades of three to five infantry regiments each, which totaled approximately 12,000 men. Each brigade was assigned one artillery battery. In addition to the infantry, there were twenty pieces of artillery and about 300 Virginia cavalrymen under Col. [[J. E. B. Stuart]]. Although the combined strength of both Confederate armies was about 34,000, only about 18,000 were actually engaged at the First Battle of Bull Run. The Army of the [[Shenandoah Valley|Shenandoah]] consisted of four infantry brigades:
**1st Brigade, commanded by Brig. Gen. [[Thomas J. Jackson]];
**2nd Brigade, commanded by Col. [[Francis S. Bartow]];
**3rd Brigade, commanded by Brig. Gen. [[Barnard Elliott Bee, Jr.|Barnard E. Bee]];
**4th Brigade, commanded by Brig. Gen. [[Edmund Kirby Smith]].

''Abstract front field return, First Corps (Army of the Potomac), July 21, 1861.''<ref name=CFS/>

''[Dated September 25, 1861.]''
{| class="wikitable plainrowheaders"
|+ <u>ARMY OF THE POTOMAC</u>
|-
|-
! scope=col rowspan=2 | Commands
! scope=col rowspan=2 | General and Staff Officers
! scope=col colspan=2 | Infantry
! scope=col colspan=2 | Cavalry
! scope=col colspan=2 | Artillery
|-
! scope=col | Officers
! scope=col | Men
! scope=col | Officers
! scope=col | Men
! scope=col | Officers
! scope=col | Men
|-
! scope=row | First Brigade
| 4 || 211 || 4,070 || || || || 
|-
! scope=row | Second Brigade
| 4 || 133 || 2,307 || || || || 
|-
! scope=row | Third Brigade
| 4 || 128 || 1,989 || || || || 
|-
! scope=row | Fourth Brigade
| 4 || 160 || 2,364 || || || || 
|-
! scope=row | Fifth Brigade
| 3 || 208 || 3,065 || || || || 
|-
! scope=row | Sixth Brigade
| 3 || 261 || 2,356 || || || || 
|-
! scope=row | [[7th Louisiana Infantry Regiment (Confederate)|Seventh Louisiana]]
| || 44 || 773 || || || || 
|-
! scope=row | [[8th Louisiana Infantry Regiment (Confederate)|Eighth Louisiana]]
| || 43 || 803 || || || || 
|-
! scope=row | [[Hampton's Legion]]
| || 27 || 627 || || || || 
|-
! scope=row | [[13th Virginia Infantry Regiment|Thirteenth Virginia]]
| || || || 34 || 642 || || 
|-
! scope=row | Harrison's Battalion (three companies)
| || || || 13 || 196 || || 
|-
! scope=row | Troops (ten) of cavalry
| || || || 38 || 545 || || 
|-
! scope=row | [[Washignton Artillery|Washington (Louisiana) Artillery]]
| || || || || || 19 || 201
|-
! scope=row | Kemper's battery
| || || || || || 4 || 76
|-
! scope=row | Latham's battery
| || || || || || 4 || 86
|-
! scope=row | Loudoun Battery
| || || || || || 3 || 55
|-
! scope=row | Shield's battery
| || || || || || 3 || 82
|-
! scope=row | Camp Pickens (heavy artillery)
| || || || || || 18 || 275
|-
! Total
| 22 || 1,215 || 18,354 || 85 || 1,383 || 51 || 775
|}
{| class="wikitable plainrowheaders"
|-
! class="Indent" | Aggregates:
|
|-
! scope=row | Infantry
| 19,569
|-
! scope=row | Cavalry
| 1,468
|-
! scope=row | Artillery
| 826
|-
!
| 21,863
|}
''Abstract from monthly report of Brig. Gen. Joseph E. Johnston's division, or Army of the Shenandoah (C.S.A.), for June 30, 1861.''<ref name=CFS/>
{| class="wikitable plainrowheaders"
|+ <u>ARMY OF THE SHENANDOAH</u>
|-
|-
! scope=col rowspan=3 | Commanding officer
! scope=col rowspan=3 | Troops
! scope=col colspan=6 | PRESENT FOR DUTY
|-
! scope=col colspan=2 | Infantry
! scope=col colspan=2 | Cavalry
! scope=col colspan=2 | Artillery
|-
! scope=col | Officers
! scope=col | Men
! scope=col | Officers
! scope=col | Men
! scope=col | Officers
! scope=col | Men
|-
! scope=row | Colonel Jackson
! scope=row | First brigade
| 128 || 2,043 || || || 4 || 81
|-
! scope=row | Col. F. S. Bartow
! scope=row | Second brigade
| 155 || 2,391 || || || 3 || 59
|-
! scope=row | Brigadier-General Bee
! scope=row | Third brigade
| 161 || 2,629 || || || 4 || 78
|-
! scope=row | Col. A. Elzey
! scope=row | Fourth brigade
| 156 || 2,106 || || || 4 || 45
|-
! scope=row | Col. J. E. B. Stuart
! scope=row | First Virginia Cavalry
| || || 21 || 313 || || 
|-
! scope=row | Col. A. C. Cummings
! scope=row | Virginia Volunteers
| 14 || 227 || || || || 
|-
!
! Total
| 614 || 9,396 || 21 || 313 || 15 || 263
|}
Aggregate present for duty.
{| class="wikitable plainrowheaders"
|-
! scope=row | General staff
| 32
|-
! scope=row | Infantry
| 10,010
|-
! scope=row | Cavalry
| 334
|-
! scope=row | Artillery
| 278
|-
!
| 10,654
|}