and two batteries of regular United States artillery.
These three divisions and their cavalry and batteries participated in the battle.
The Fourth division, under Brig.-Gen. T. Runyon
, and the Fifth, under Col. D. S. Miles
, each composed of two brigades of infantry, two batteries of regular United States artillery, and one volunteer battery, were held in reserve, in front of and at Centreville
, and in its rear, and did not participate in the battle, except that the Fifth had some skirmishing while covering the retreat of the Federal
The Fifth division guarded the roads leading to the Potomac
and did not get nearer to Centreville
than about Fairfax
, 7 miles eastward.
The official returns for July 17th show that McDowell
had 34,127 men present for duty.
claims that the rank and file of his army that participated in the battle of Bull Run
numbered 18,572, with 24 pieces of artillery.
This does not include the two divisions in reserve, which had over 11,000 men and 25 pieces of artillery.1
The Confederate forces at Bull Run
were embraced in the army of the Potomac, which, under Brig.-Gen. G. T. Beauregard
, had been holding Manassas
and the line of the Potomac
east of the Blue ridge
, and the army of the Shenandoah, under Gen. J. E. Johnston
, which reinforced the former, from the Shenandoah valley, during the engagement.
The army of the Potomac, before the battle, consisted of the First brigade, one North Carolina
and four South Carolina regiments, under Brig.-Gen. M. L. Bonham
; Second brigade, two Alabama
and one Louisiana
regiments, under Brig.-Gen. R. S. Ewell
; Third brigade, two Mississippi
and one South Carolina regiments, under Brig.-Gen. D. R. Jones
; Fourth brigade, one North Carolina
and three Virginia
regiments, under Brig.-Gen. James Longstreet
; Fifth brigade, one Louisiana
battalion and five Virginia
regiments, under Col. P. St. George Cocke
; Sixth brigade, two Virginia
, one Mississippi
and one South Carolina regiment, under Col. J. A. Early
; and not brigaded, two Louisiana
, and one South Carolina infantry regiment, two cavalry regiments and one artillery battalion, and five artillery batteries.