When McDowell advanced upon the Confederate forces under Beauregard at Manassas, Johnston moved from the Shenandoah Valley with great rapidity to Beauregard's assistance.
As senior officer he took command on the field, and at Bull Run (Manassas) (q.v.) won the first important Confederate victory.
McClellan and the Army of the Potomac faced Johnston, who with the Army of northern Virginia lay at Manassas, exercising and training his men with no less care than his opponent.
Johnston had, long ere this, fallen back from Manassas towards Richmond, and the two armies were in touch when a serious check was given to McClellan by the brilliant successes of Jackson in the Shenandoah Valley.
On the 24th of August Lee ordered Jackson to march round Pope's right wing and descend on his rear through Thoroughfare Gap on Manassas and the old battle-ground of 1861.
By the ist of September the campaign of "Second Manassas" was over.
Of the six great impacts made upon the Confederacy, four were upon Virginian soil: the first Manassas campaign (1861), the Peninsular battles (1862), second Manassas (1862), Fredericksburg, Chancellorsville (1862-63) and the great Wilderness-Petersburg series of attacks (1864-65).
The principal battles were: the first Manassas, or Bull Run (July 21, 1861); those around Richmond (June 26-July 2, 1862); second Manassas (August 29-30); Fredericksburg (December 12, 1862); Mechanicsville (May 2 and 3, 186 3); the Wilderness (May 5 and 6); Spottsylvania (May 8); North Anna and Bethesda church (May 29-30); Cold Harbor (June 3); the battles around Petersburg (June 15, July 30 and November 1, 1864); and Five Forks (April 1) and Appomattox (April 8-9, 1865).
MANASSAS, a district of Prince William county, Virginia, and a town of the district, about 30 m.
The village of Manassas (in the town), known also as Manassas Junction, is served by the Chesapeake & Ohio and the Southern railways.