Confederates Win Second Battle of Bull Run

Context

Following the collapse of George B. McClellan's Peninsula Campaign in the Seven Days Battles, President Abraham Lincoln reorganized scattered Union forces in northern Virginia into the new Army of Virginia. He placed Maj. Gen. John Pope in command, seeking a more aggressive leader to protect Washington and draw Confederate attention away from Richmond. Pope's mission also included advancing toward Gordonsville to threaten Confederate supply lines.

Confederate Gen. Robert E. Lee, commanding the Army of Northern Virginia, saw an opening. With McClellan's forces still withdrawing from the Peninsula, Lee could shift troops northward without immediate risk to the Confederate capital. He sent Stonewall Jackson's corps to confront Pope while keeping Longstreet's wing in reserve, aiming to defeat the Union army in detail before reinforcements arrived.

What Happened

On August 25, Jackson began a rapid flanking march around Pope's right, covering more than fifty miles to strike the Orange & Alexandria Railroad. By August 27 his troops seized the massive Union supply depot at Manassas Junction, burned the stores, and withdrew a short distance to a concealed position along an unfinished railroad grade on Stony Ridge near Groveton. That same evening Longstreet's wing forced its way through light resistance at Thoroughfare Gap.

Pope, convinced he had isolated Jackson, concentrated his army for an attack. On August 28 Jackson's men fought a sharp engagement at Brawner's Farm to draw the Union columns forward. The next day Pope launched repeated but uncoordinated assaults against Jackson's line; the defenders held the railroad cuts despite heavy losses on both sides. Longstreet arrived on the field around noon and deployed on Jackson's right, unseen by Pope.

On August 30 Pope renewed the offensive, ordering Fitz John Porter's V Corps and supporting units to strike Jackson's right at the Deep Cut. Massed Confederate artillery shattered the assault. Longstreet then unleashed approximately 25,000 men in five divisions—the largest simultaneous infantry attack of the war—crushing the exposed Union left flank near Chinn Ridge and Henry Hill. Only determined rear-guard fighting prevented a complete rout as Pope's army fell back across Bull Run toward Centreville.

Aftermath

Pope's defeated forces retreated into the fortifications around Washington, D.C. Casualties were heavy: roughly 14,500 Union and 7,300 Confederate. Lee immediately pressed northward, using the victory to launch the Maryland Campaign in early September.

Legacy

The battle showcased Lee's tactical flexibility and the effectiveness of his corps system, restoring Confederate momentum in the Eastern Theater after the Peninsula setbacks. It directly enabled the South's first invasion of the North and heightened pressure on Lincoln to replace Pope with McClellan once more.

Historians view Second Bull Run as a textbook demonstration of operational maneuver and the dangers of divided Union command. The defeat contributed to ongoing reorganization of the Army of the Potomac and underscored the challenges of coordinating large forces across multiple departments.