First Battle of Bull Run

Other Names: First Bull Run

Location: Fairfax County and Prince William County

Campaign: Manassas Campaign (July 1861)

Date(s): July 21, 1861

Principal Commanders: Brig. Gen. Irvin McDowell [US]; Brig. Gen. Joseph E. Johnston and Brig. Gen. P.G.T. Beauregard [CS]

Forces Engaged: 60,680 total (US 28,450; CS 32,230)

Estimated Casualties: 4,700 total (US 2,950; CS 1,750)

Description: This was the first major land battle of the armies in Virginia. On July 16, 1861, the untried Union army under Brig. Gen. Irvin McDowell marched from Washington against the Confederate army, which was drawn up behind Bull Run beyond Centreville. On the 21st, McDowell crossed at Sudley Ford and attacked the Confederate left flank on Matthews Hill. Fighting raged throughout the day as Confederate forces were driven back to Henry Hill. Late in the afternoon, Confederate reinforcements (one brigade arriving by rail from the Shenandoah Valley) extended and broke the Union right flank. The Federal retreat rapidly deteriorated into a rout. Although victorious, Confederate forces were too disorganized to pursue. Confederate Gen. Bee and Col. Bartow were killed. Thomas J. Jackson earned the nom de guerre “Stonewall.” By July 22, the shattered Union army reached the safety of Washington. This battle convinced the Lincoln administration that the war would be a long and costly affair. McDowell was relieved of command of the Union army and replaced by Maj. Gen. George B. McClellan, who set about reorganizing and training the troops.

Result(s): Confederate victory

CWSAC Reference #: VA005

Preservation Priority: III.1 (Class A)

The First Battle of Bull Run, also known as the First Battle of Manassas (the name used by Confederate forces and still often used in the Southern United States), was fought July 21, 1861, near Manassas, Virginia. It was the first major land battle of the American Civil War.

Just months after the start of the war at Fort Sumter, the Northern public clamored for a march against the Confederate capital of Richmond, Virginia, which could bring an early end to the war. Yielding to this political pressure, unseasoned Union Army troops under Brig. Gen. Irvin McDowell advanced across Bull Run against the equally unseasoned Confederate Army under Brig. Gen. P.G.T. Beauregard near Manassas Junction. McDowell's ambitious plan for a surprise flank attack against the Confederate left was not well executed by his inexperienced officers and men, but the Confederates, who had been planning to attack the Union left flank, found themselves at an initial disadvantage.

Confederate reinforcements under the command of Brig. Gen. Joseph E. Johnston arrived from the Shenandoah Valley by railroad and the course of the battle changed. A brigade of Virginians under a relatively unknown colonel from the Virginia Military Institute, Thomas J. Jackson, stood their ground and Jackson received his famous nickname, "Stonewall". The Confederates launched a strong counterattack and as the Union troops began withdrawing under pressure, many panicked and it turned into a rout as they frantically ran in the direction of nearby Washington, D.C. Both sides were sobered by the violence and casualties of the battle, and they realized that the war would potentially be much longer and bloodier than they had originally anticipated.

Background

Brig. Gen. Irvin McDowell was appointed by President Abraham Lincoln to command the Army of Northeastern Virginia. Once in this capacity, McDowell was harassed by impatient politicians and citizens in Washington, who wished to see a quick battlefield victo...