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

The Battle of Blackburn's Ford took place on July 18, 1861, in the Confederate state of Virginia, as part of the Manassas campaign of the American Civil War. Union general Irvin McDowell's Army of Northeastern Virginia was marching south towards the Confederate capitol of Richmond, and encountered the Confederate Army of the Potomac under the command of P. G. T. Beauregard. McDowell sent troops from Daniel Tyler's division to probe the Confederate defenses along Bull Run Creek to locate the Confederate left flank. At Blackburn's Ford, the Union troops attempted to cross but Confederate fire broke up the attack. The repulse at Blackburn's Ford led McDowell to seek to attack the Confederates at a different point along their line, leading to the First Battle of Bull Run days later.

The First Battle of Bull Run, also known as the First Battle of Manassas, was the first major battle of the American Civil War and was a Confederate victory. The battle was fought on July 21, 1861 in Prince William County, Virginia, just north of the city of Manassas and about 30 miles west-southwest of Washington, D.C. The Union's forces were slow in positioning themselves, allowing Confederate reinforcements time to arrive by rail. Each side had about 18,000 poorly trained and poorly led troops in their first battle. It was a Confederate victory, followed by a disorganized retreat of the Union forces.

The Battle of Fairfax Court House was the first land engagement of the American Civil War with fatal casualties. On June 1, 1861, a Union scouting party clashed with the local militia in the village of Fairfax Court House, Virginia, resulting in the first deaths in action, and the first wounding of a field-grade officer.
Henry House Hill is a location near Bull Run in Virginia. Named for the house of the Henry family that sits atop it, the hill begins near the road of Centreville, Virginia, after Gainesville, Virginia, to the today's U.S. Route 29, the Warrenton Turnpike. It is a slow, constant rise toward the south over a length of approximately 730 meters. This hill was an important site of the battles of First and Second Bull Run in the American Civil War. The battle raged on the north side of the hill in predominantly open grass country; the south side was relatively closely covered with trees. The hill received its name from Dr. Isaac Henry, who lived with his family in a house on the plateau of the hill. On July 21, 1861, the house was inhabited by his widow, Judith Carter Henry, and their two sons. The 85-year-old woman was bed-ridden and unable to leave the house. Mrs. Henry was mortally wounded when a projectile of the Union artillery crashed through the bedroom wall and tore off one of her feet and inflicted multiple injuries, from which she died later that day.

The Battle of Hoke's Run, also known as the Battle of Falling Waters or Hainesville, took place on July 2, 1861, in Berkeley County, Virginia as part of the Manassas Campaign of the American Civil War. Notable as an early engagement of Confederate Colonel Thomas J. Jackson and his Brigade of Virginia Volunteers, nineteen days before their famous nickname would originate, this brief skirmish was hailed by both sides as a stern lesson to the other. Acting precisely upon the orders of a superior officer about how to operate in the face of superior numbers, Jackson's forces resisted General Robert Patterson's Union forces briefly and then slowly retreated over several miles.

The Battle of Vienna, Virginia was a minor engagement between Union and Confederate forces on June 17, 1861, during the early days of the American Civil War.