The Manassas campaign was a series of military engagements in the Eastern Theater of the American Civil War.

Background

Military and political situation

The Confederate forces in northern Virginia were organized into two field armies. Brigadier General P. G. T. Beauregard was appointed commander of the

Confederate Army of the Potomac The Confederate Army of the Potomac, whose name was short-lived, was under the command of Brig. Gen. P. G. T. Beauregard in the early days of the American Civil War. Its only major combat action was the First Battle of Bull Run. Afterwards, the ...

in northeastern Virginia to defend the rail center of Manassas Junction; while General Joseph E. Johnston commanded the Army of the Shenandoah near Harpers Ferry in the Shenandoah Valley. The Manassas Gap Railroad connected the two forces and allowed for the quick transfer of reinforcements between the two armies. During the months of June and July, Beauregard sent Confederate President Jefferson Davis several proposals for offensive operations into Maryland, involving the various Confederate armies in Virginia, but Davis rejected them for being impractical, saying the Confederates lacked the proper resources to support any of his offensive plans. Following the Union occupation of Alexandria, Virginia, the Union forces in Virginia were organized into the Department of Northeastern Virginia, commanded by Brigadier General Irvin McDowell, who was ordered to advance on the Confederate national capital of

Richmond, Virginia (Thus do we reach the stars) , image_map = , mapsize = 250 px , map_caption = Location within Virginia , pushpin_map = Virginia#USA , pushpin_label = Richmond , pushpin_m ...

. Meanwhile,

Robert Patterson Robert Patterson (January 12, 1792 – August 7, 1881) was an Irish-born United States major general during the American Civil War, chiefly remembered for inflicting an early defeat on Stonewall Jackson, but crucially failing to stop Confed ...

was assigned to command the Department of Pennsylvania and was ordered to tie down Johnston's forces in the northern Shenandoah Valley, preventing him from reinforcing Beauregard. Patterson advanced into the Valley in early June, forcing the evacuation of Harpers Ferry on June 17. Johnston retreated back to the town of Winchester, where he was reinforced by home guard units and local militia, which caused Patterson to think he was outnumbered. During this time, Patterson was having difficulty receiving supplies from Pennsylvania; also his regiments of three–month volunteers were nearing the end of their enlistments and were refusing to stay any longer. The Union general–in–chief, Brevet Lieutenant General

Winfield Scott Winfield Scott (June 13, 1786May 29, 1866) was an American military commander and political candidate. He served as a general in the United States Army from 1814 to 1861, taking part in the War of 1812, the Mexican–American War, the early s ...

, was pressing him to send his Regular Army units to McDowell's army. During the months of June and early July, the armies of McDowell and Beauregard engaged in several skirmishes in northeastern Virginia while the Union government and military leadership debated the proper course of action for McDowell to take. Scott favored concentrating a Union army to capture the Mississippi River valley, while McDowell viewed his army as too inexperienced to attack Beauregard yet. Due to Pressure from U.S. President Abraham Lincoln and the Union press, McDowell started his campaign against Manassas Junction on July 17. Johnston received orders the next day to start transferring his army to Manassas Junction to reinforce Beauregard; using the Manassas Gap Railroad, his army arrived on July 20 and 21. The Manassas Campaign would end in a Confederate Victory due to this inexperience. It was this early campaign that would show the North that the Confederacy was not going to be a quick rebellion.

Opposing forces

Union

Confederate

Battles

Hoke's Run

Following the Confederate abandonment of Harpers Ferry on June 15, Johnston sent Colonel Thomas J. Jackson's brigade to establish a camp near the town of Martinsburg, so to both serve as a warning of a Union advance and to delay Patterson's force. On July 2, Patterson crossed the Potomac and advanced on Jackson's position. Outnumbered and outflanked, Jackson fell back slowly, giving time for his supply train to escape before retreating to rejoin Johnston's main army.

Blackburn's Ford

McDowell's army arrived at Centreville during the morning of July 18, led by Brigadier General David Tyler's division. Under orders to reconnoiter the Confederate defenses near Blackburn's Ford but not to bring on an engagement, Tyler launched an attack with Colonel Israel B. Richardson's brigade but was repulsed by the brigades of James Longstreet and Jubal Early.The battle ended with an artillery duel which lasted until dark, at which time Tyler withdrew back to Centreville.

First Bull Run (Manassas)

Following Tyler's defeat, McDowell decided to attempt an attack on the Confederate left flank. Starting about dawn on the 21, one Union division started a diversionary attack on the Stone Bridge on the Confederate left and two other divisions demonstrated against the Confederate center and right, while two other divisions marched around the Confederate left flank to launch an attack on the Confederate rear. The Union flanking column was spotted and Confederate reinforcements were rushed to Matthew's Hill but were driven back to Henry House Hill. A new Confederate defensive line, using brigades from Johnston's army, was formed along the hill, where they held against repeated Union attacks during the afternoon. A Confederate attack on the Union left flank in the late afternoon forced McDowell to retreat back to the defenses of Washington, D.C.

Aftermath

Davis arrived on the Manassas battlefield soon after the battle ended. Although he attempted to organize a pursuit of the Union army, he was convinced that the Confederate armies were too disorganized to mount an effective pursuit. The dispute between Beauregard and Davis over who was responsible for the failed pursuit resulted in Beauregard's transfer to the Western Theater. In October, Johnston's and Beauregard's commands were merged into the Department of Northern Virginia, with the combined army retaining the name "Army of the Potomac". Following First Bull Run, McDowell retreated to Centreville and set up a rearguard. At a council of war held after sunset, a majority of officers urged a retreat, which started that night. In August, the Department of Northeastern Virginia was merged with other departments in Maryland to form the Department of the Potomac, commanded by George C. McClellan. McDowell was demoted to commanding a division. Patterson was blamed for allowing Johnston to reinforce Beauregard and was also relieved of command.Gottfried, p 76.

Notes

References

* Davis, William C. ''Battle at Bull Run: A History of the First Major Campaign of the Civil War''. Garden City, New York: Doubleday & Company, Inc., 1977. * Detzel, David. ''Dooneybrook: The Battle of Bull Run, 1861''. New York: Harcourt, Inc., 2004. . * Gimbel, Gary. "The End of Innocence: The Battle of Falling Waters", in ''Blue & Gray'', Volume XXII, number 4 (Fall 2005). * Gottfried, Bradley G. ''The Maps of First Bull Run: An Atlas of the First Bull Run (Manassas) Campaign, including the Battle of Ball's Bluff, June – October 1861''. New York: Savas Beatie, 2009. . * Robertson, William G. "First Manassas, Virginia (VA005), Prince William County, July 21, 1861", in ''The Civil War Battlefield Guide'', 2nd edition, edited by Francis H. Kennedy. New York: Houghton Mifflin Company, 1998. .

Memoirs and primary sources

* Longstreet, James. ''From Manassas to Appomattox: Memoirs of the Civil War in America''. New York: Da Capo Press, 1992. . First published in 1896 by J. B. Lippincott and Co. * U.S. War Department
''The War of the Rebellion''
''a Compilation of the Official Records of the Union and Confederate Armies''. Washington, DC: U.S. Government Printing Office, 1880–1901

External links

Battle of Bull Run
photos, history articles, and battlefield news ( Civil War Trust)
"Map of the Battles of Bull Run, 1861"
prepared by Army engineer, National Archives and Record Administration, at

World Digital Library The World Digital Library (WDL) is an international digital library operated by UNESCO and the United States Library of Congress. The WDL has stated that its mission is to promote international and intercultural understanding, expand the volume ...

Manassas National Battlefield Park website

* ttp://www.sonofthesouth.net/leefoundation/civil-war/1861/august/battle-bull-run.htm ''Harper's Weekly'' 1861 Report on the Battle of Bull Run
Civil War Home website on First Bull Run

FirstBullRun.co.uk
*

''Map of the Battles of Bull Run Near Manassas''
Solomon Bamberger. Zoomable high-resolution map.
Newspaper coverage of the First Battle of Bull Run
* * {{DEFAULTSORT:First Battle Of Bull Run Bull Run I Bull Run I Prince William County in the American Civil War Fairfax County in the American Civil War Bull Run I United States Marine Corps in the 18th and 19th centuries 1861 in the American Civil War 1861 in Virginia