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Thoroughfare Gap

Chapman's Mill

Prince William County, VA  |  Aug 28, 1862

After the early summer collapse of the Union Peninsula Campaign offensive to capture Richmond, Robert E. Lee sought to move his army north and threaten Washington DC before Union forces could regroup.  His trusted and highly capable "wing" commanders, Maj. Gen. "Stonewall" Jackson and Lieut. Gen. James Longstreet, brought Lee's army within 35 miles of the Union capital by the end of August. Jackson waited for the arriving Union army near Manassas. Longstreet, trailing Jackson by a day, met the Union division of Brig. Gen. James Ricketts at Thoroughfare Gap in the Bull Run Mountains on August 28th. Georgia regiments from two brigades fought the defending Yankees from Pennsylvania and Massachusetts on the steep north and south slopes of the gap near Chapman's Mill along both sides of the Manassas Gap Railroad. Defeated by the end of the day, and flanked by a three brigades under Brig. Gen. Cadmus Wilcox passing through Hopewell Gap several miles to the north, Ricketts retired, withdrawing east via Gainesville to Manassas Junction. The seemingly inconsequential battle fought here virtually ensured Maj. Gen. John Pope’s defeat during the battle at Manassas on Aug. 29-30th because it allowed the two wings of Lee’s army to unite against him.

All battles of the Northern Virginia Campaign

Civil War  |  Battle
Cedar Mountain
Culpeper County, VA  |  Aug 9, 1862
Result: Confederate Victory
Est. Casualties: 3,691
Union: 2,353
Confederate: 1,338
Civil War  |  Battle
Second Manassas
Prince William and Fairfax Counties, VA  |  Aug 28 - 30, 1862
Result: Confederate Victory
Est. Casualties: 22,177
Union: 13,824
Confederate: 8,353
Civil War  |  Battle
Thoroughfare Gap
Prince William County, VA  |  Aug 28, 1862
Result: Confederate Victory
Est. Casualties: 100
Civil War  |  Battle
Chantilly
Fairfax County, VA  |  Sep 1, 1862
Result: Inconclusive
Est. Casualties: 2,100
Union: 1,300
Confederate: 800

Related Battles

Broad Run, VA | August 28, 1862
Result: Confederate Victory
Commanders
Forces Engaged
33,000
Union
5,000
Confed.
28,000