Question: Which battle lasted longer, the Second Battle of Bull Run or Seven Days Battles?

Context paragraphs:
Northern Virginia Campaign: The Northern Virginia Campaign, also known as the Second Bull Run Campaign or Second Manassas Campaign, was a series of battles fought in Virginia during August and September 1862 in the Eastern Theater of the American Civil War.  Confederate General Robert E. Lee followed up his successes of the Seven Days Battles in the Peninsula Campaign by moving north toward Washington, D.C., and defeating Maj. Gen. John Pope and his Army of Virginia.

Take Command (video game): Take Command is a series of real-time tactics computer games by MadMinute Games.  As of August 2006 the series consist of two games, Take Command: Bull Run (a.k.a.  The History Channel Civil War The Battle of Bull Run Take Command: 1861) (2004) and Take Command - 2nd Manassas (2006).  The games are real-time wargames depicting some of the major battles of the American Civil War.  The developers describe the games as "real-time combat simulators".  The first game was released under the "Activision Value" brand, which is Activision's budget line.  The second game is released through Paradox, a Swedish publisher that specializes in strategy games.  A third game, based on the Battle of Shiloh, was said to be in development according to the instruction manual for 2nd Manassas, but has likely been discontinued.

USNS Bull Run (T-AO-156): The SS Bull Run was a type T2 tanker built at Sun Shipbuilding and Drydock Co. in Chester, PA as hull number 287 and USMC number 362 in 1943.  In 1956, the ship was acquired by the US Navy from the Maritime Administration, assigned to MSTS, and placed in-service as the USNS Bull Run (T-AO-156).  It left the navy in 1957, going back to the Maritime Administration.  In 1969, the stern of the Bull Run was attached to the bow of the Type C4 ship the Anchorage, and the completed ship then retained the name Anchorage.  The bow of the Bull Run was then scrapped.

Irvin McDowell: Irvin McDowell (October 15, 1818 – May 4, 1885) was a career American army officer.  He is best known for his defeat in the First Battle of Bull Run, the first large-scale battle of the American Civil War.  In 1862, he was given command of the I Corps of the Army of the Potomac.  He fought unsuccessfully against Stonewall Jackson's troops during the Valley Campaign of 1862, and was blamed for contributing to the defeat of United States troops at the Second Battle of Bull Run in August.

Manassas National Battlefield Park: Manassas National Battlefield Park, located north of Manassas, in Prince William County, Virginia, preserves the site of two major American Civil War battles: the First Battle of Bull Run on July 21, 1861, and the Second Battle of Bull Run which was fought between August 28 and August 30, 1862 (also known as the "First Battle of Manassas" and the "Second Battle of Manassas", respectively).  The peaceful Virginia countryside bore witness to clashes between the armies of the North (Union) and the South (Confederacy), and it was there that Confederate General Thomas J. Jackson acquired his nickname "Stonewall."

Second Battle of Bull Run: The Second Battle of Bull Run or Battle of Second Manassas was fought August 28–30, 1862 in Prince William County, Virginia, as part of the American Civil War.  It was the culmination of the Northern Virginia Campaign waged by Confederate Gen. Robert E. Lee's Army of Northern Virginia against Union Maj. Gen. John Pope's Army of Virginia, and a battle of much larger scale and numbers than the First Battle of Bull Run (or "First Manassas") fought on July 21, 1861 on the same ground.

South Fork Bull Run River: The South Fork Bull Run River is a tributary, about 6 mi long, of the Bull Run River in the U.S. state of Oregon.  Part of the system that provides drinking water to the city of Portland, it flows generally west through a protected part of the Mount Hood National Forest in Clackamas County.  It joins the Bull Run River at Bull Run Reservoir 2, about 8 mi from the larger stream's confluence with the Sandy River.

North Fork Bull Run River: The North Fork Bull Run River is a tributary, about 6 mi long, of the Bull Run River in the U.S. state of Oregon.  Part of the system that provides drinking water to the city of Portland, it flows generally south through a protected part of the Mount Hood National Forest in Multnomah County.  It joins the Bull Run River at Bull Run Reservoir 1.

Savage's Station, Virginia: Savage's Station was the wartime name of a supply depot, ammunition dump, field hospital, and command headquarters of the Army of the Potomac during the Peninsula Campaign of the American Civil War.  Savage's Station was located in Henrico County, Virginia on what was the Richmond and York River Railroad, however the historical department of the Norfolk Southern Railroad, the railroad track's current owner, has no record that an actual train station or station house ever existed on the property.  A farmhouse is known to have been located in a copse of trees on a small knoll next to the railroad track and is visible in several period drawings and photographs made during the war.  The house served as the nucleus of a large field hospital during and after the battle of Seven Pines and the Seven Days Battles.  The house also functioned as General George B. McClellan's headquarters during the battle of Savage's Station on June 29, 1862.  Although the house survived the battle in 1862, it was burned by Federal cavalry under General Philip H. Sheridan in 1864.  The house appears to have never been rebuilt, and no trace of it remains today.  However, a smokehouse from the 19th century still existed on the property as late as the 1930s when it was photographed during a survey of local historical structures as a project of the Civilian Conservation Corps.  The smokehouse fell into ruin and collapsed sometime prior to the 1980s.  A small brick-walled cemetery from the 18th century still sits near the former location of the house not far from the railroad track.

Seven Days Battles: The Seven Days Battles were a series of six major battles over the seven days from June 25 to July 1, 1862, near Richmond, Virginia, during the American Civil War.  Confederate General Robert E. Lee drove the invading Union Army of the Potomac, commanded by Maj. Gen. George B. McClellan, away from Richmond and into a retreat down the Virginia Peninsula.  The series of battles is sometimes known erroneously as the Seven Days Campaign, but it was actually the culmination of the Peninsula Campaign, not a separate campaign in its own right.

Supporting paragraphs: Second Battle of Bull Run Seven Days Battles
Answer: The Seven Days Battles