28-30 August – Second Battle of Bull Run (Second Manassas)
The culmination of an offensive campaign waged to drive the Union Army of Virginia out of that state. General Robert E. Lee’s Army of Northern Virginia hands a significant defeat to Union forces.
Some 50,000 Confederate soldiers face about 62,000 Union soldiers in savage fighting over three days. The fighting on the 28th was at Brawner’s Farm and ended in a stalemate. The next day the Union forces attacked against a Confederate position along an unfinished railroad cutting, and both sides suffered heavy casualties. On the 30th, a massed assault by Confederate forces broke the Union left flank, and caused the Union army to fall back to Bull Run. Union forces then fell back towards Maryland, setting the stage for the Confederates to take the fight to Union territory for the first time.