First Battle of Kernstown - Aftermath

Aftermath

Union casualties were 590 (118 killed, 450 wounded, 22 captured or missing), Confederate 718 (80 killed, 375 wounded, 263 captured or missing).

Despite the Union victory, President Abraham Lincoln was disturbed by Jackson's audacity and his potential threat to Washington. He sent Banks back to the Valley along with Alpheus Williams's division. He also was concerned that Jackson might move into western Virginia against Maj. Gen. John C. Frémont, so he ordered that the division of Brig. Gen. Louis Blenker be detached from McClellan's Army of the Potomac and sent to reinforce Frémont. Lincoln also took this opportunity to re-examine Maj. Gen. George B. McClellan's plans for the defenses of Washington while the Peninsula Campaign was underway and decided that the forces were insufficient. He eventually ordered that the corps of Maj. Gen. Irvin McDowell, which was moving south against Richmond in support of McClellan, remain in the vicinity of the capital. McClellan claimed that the loss of these forces prevented him from taking Richmond during his campaign. The strategic realignment of Union forces caused by Jackson's battle at Kernstown—the only battle he lost in his military career—turned out to be a strategic victory for the Confederacy. The remainder of Jackson's Valley Campaign consisted of lightning movements and five victories against superior forces organized into three Union armies, which elevated him to the position of the most famous general in the Confederacy (until this reputation was later supplanted by his superior, Gen. Robert E. Lee).

Seldom during the Civil War was a general officer as gallant and as capable as Garnett treated so unjustly.... By any objective standard, Garnett had done the best at Kernstown that could reasonably have been expected under the circumstances as they existed. Ignorant of Jackson's tactical blueprint, his brigade out of ammunition and outflanked, Garnett took the only sane course of action. In doing so he saved the Valley army.

Jackson refused to accept any responsibility for the defeat and subsequently arrested the commander of his old Stonewall Brigade, Brig. Gen. Richard B. Garnett, for retreating from the battlefield before permission was received. The Stonewall Brigade's withdrawal, which came after it received the bulk of the Union fire and suffered the majority of Confederate casualties, uncovered the right of Fulkerson's Brigade, forcing it to also withdraw and starting a panic. He was replaced by Brig. Gen. Charles S. Winder. During the invasion of Maryland in September, Robert E. Lee ordered the charges against him dropped, but Garnett suffered from the humiliation of his court-martial for over a year, until he was killed at Gettysburg during Pickett's Charge.

A Second Battle of Kernstown occurred in the Valley Campaigns of 1864.