Key facts about the First Battle of Bull Run.
Date and Location
- July 21, 1861
- Fairfax County And Prince William County, Virginia
Principal Union Commanders
- Brigadier General Irvin McDowell
Principal Confederate Commanders
- Brigadier General Joseph E. Johnston
- Brigadier General P.G.T. Beauregard
Union Forces Engaged
- Forces from the Military District of Northeastern Virginia (later unofficially known as the Army of Northeastern Virginia)
Confederate Forces Engaged
- Army of the Potomac and Army of the Shenandoah
Number of Union Forces Engaged
- Roughly 28,450
Number of Confederate Forces Engaged
- Roughly 32,230
Estimated Union Casualties
- 2,896 (460 killed; 1,124 wounded; and 1,312 captured/missing)
Estimated Confederate Casualties
- 1,982 (387 killed; 1,582 wounded; and 13 missing)
- Confederate victory.
- The Union forces at the First Battle of Bull Run from Military District of Northeastern Virginia were later unofficially designated as the Army of Northeastern Virginia.
- After the First Battle of Bull Run, the Army of Northeastern Virginia formed the nucleus of the Union Army of the Potomac.
- Confederate General Thomas J. Jackson acquired the nickname “Stonewall” during the First Battle of Bull Run.
- In 1862, the Union Army of the Potomac and the Confederate Army of Northern Virginia fought another battle known as the Second Battle of Bull Run on basically the same ground as the First Battle of Bull Run.
- Combined casualties at the First Battle of Bull Run totaled nearly 5,000 (killed, wounded, and captured or missing).
- Nearly 850 Americans (460 Union plus 387 Confederate) perished at the First Battle of Bull Run.
- Although the First Battle of Bull Run was the deadliest conflict of the Civil War at the time it took place, it was not among the thirty bloodiest battles of the war (it was number 32).
- Civil War lore perpetuates the myth that throngs of civilians from Washington, including some noted politicians, who ventured out to witness the fighting as they picnicked, impeded the Federal retreat at the First Battle of Bull Run.
- The First Battle of Bull Run marked the first use of signal flags for long-range communication during the Civil War.
- The First Battle of Bull Run marked the first time in history that trains were used to transport soldiers to a battlefield.