Beyond the strategic importance of engagements at Kernstown, McDowell, Front Royal, Winchester, Cross Keys, and Port Republic the campaign boosted Confederacy morale at a time when it had suffered a springtime of defeats.
Employing audacity and rapid, unpredictable movements on interior lines, Jackson’s 17,000 men marched 646 miles in 48 days as they successfully engaged three Union armies (52,000 men).
Jackson suffered a defeat (his sole defeat of the war) at the First Battle of Kernstown (March 23, 1862) against Col. Nathan Kimball (part of Union Maj. Gen. Nathaniel P. Banks’s army), but it proved to be a strategic Confederate victory because President Abraham Lincoln reinforced his Valley forces with troops that had originally been designated for the Peninsula Campaign against Richmond.
On May 8, after more than a month of skirmishing with Banks, who later would campaign in Louisiana, Jackson moved to the west of the Valley and drove back elements of Maj. Gen. John C. Frémont’s army in the Battle of McDowell, preventing a potential combination of the two Union armies against him.
Jackson then headed down the Valley once again to confront Banks. Concealing his movement in the Luray Valley, Jackson joined forces with Maj. Gen. Richard S. Ewell and captured the federal garrison at Front Royal on May 23, causing Banks to retreat to the north. On May 25, in the First Battle of Winchester, Jackson defeated Banks and pursued him until the Union Army crossed the Potomac River into Maryland.
Bringing in Union reinforcements from eastern Virginia, Brig. Gen. James Shields recaptured Front Royal and planned to link up with Frémont in Strasburg.
Jackson was now threatened by three small Union armies. Withdrawing up the Valley from Winchester, Jackson was pursued by Frémont and Shields.
On June 8, Ewell defeated Frémont in the Battle of Cross Keys and on the following day, crossed the North River to join forces with Jackson to defeat Shields in the Battle of Port Republic, bringing the campaign to a close.
Jackson followed up his successful campaign by forced marches to join Gen. Robert E. Lee for the Seven Days Battles outside Richmond.
Jackson was at that point the Confederacy’s most-famous general, to be succeeded in that spot only by Lee.
Jackson, who got his nickname at the First Battle of Bull Run (“There is Jackson standing like a stone wall”) in 1861, was a factor in significant battles in the months to come - Second Bull Run, Antietam, and Fredericksburg - until being mortally wounded by friendly fire during the Battle of Chancellorsville in May 1863.