who won the 1st battle of bull run
First Battle of Bull Run
short
Confederate
First Battle of Bull Run First Battle of Manassas Part of the American Civil War First Battle of Bull Run . Chromolithograph by Kurz & Allison , 1889 Date July 21 , 1861 ( 1861 - 07 - 21 ) Location Fairfax County and Prince William County , Virginia 38 ° 48 ′ 53 '' N 77 ° 31 ′ 22 '' W ﻿ / ﻿ 38.8147 ° N 77.5227 ° W ﻿ / 38.8147 ; - 77.5227 Coordinates : 38 ° 48 ′ 53 '' N 77 ° 31 ′ 22 '' W ﻿ / ﻿ 38.8147 ° N 77.5227 ° W ﻿ / 38.8147 ; - 77.5227 Result Decisive Confederate victory Belligerents United States ( Union ) Confederate States ( Confederacy ) Commanders and leaders Political leaders : Abraham Lincoln Military commanders : Winfield Scott Irvin McDowell Robert Patterson Political leaders : Jefferson Davis Military commanders : P.G.T. Beauregard Thomas `` Stonewall '' Jackson ( WIA ) Joseph E. Johnston Units involved Department of Northeastern Virginia : Army of Northeastern Virginia Department of Pennsylvania : Patterson 's Command ( not engaged ) Army of the Potomac Army of the Shenandoah Strength Army of Northeastern Virginia : 35,732 ( c. 18,000 engaged ) Patterson 's Command : 14 -- 18,000 ( not engaged ) 32,000 -- 34,000 ( c. 18,000 engaged ) Casualties and losses 2,708 ( 481 killed ; 1,011 wounded ; 1,216 missing ) 1,982 ( 387 killed ; 1,582 wounded ; 13 missing )