The September 7–9, 1863 fall of the Cumberland Gap was a victory for Union forces under the command of Ambrose Burnside during his American Civil War campaign for Knoxville. The bloodless engagement cost the Confederates 2,300 men captured and control of the Cumberland Gap.
Major General Ambrose Burnside, commander of the Department and Army of the Ohio, began to advance against Knoxville, Tennessee. Burnside left Cincinnati, Ohio in mid-August 1863. The direct route ran through the Confederate-held Cumberland Gap. Burnside had been delayed in earlier attempts to move out against Knoxville and thus chose not to spend the time to force a passage of the gap. Instead he detached one brigade under Colonel John F. DeCourcy to pose a threat to Brigadier General John W. Frazer's 2,300 man garrison, while the rest of the army bypassed to the south over 40 miles in rugged mountainous terrain. DeCourcy had previously led a brigade in the 1862 operations against the Cumberland Gap under George W. Morgan.
Despite this, Burnside made a rapid advance on Knoxville. Many of the Confederates in eastern Tennessee had been withdrawn for the upcoming Battle of Chickamauga, leaving only two brigades under General Sam Jones (including Frazer's). Having successfully occupied Knoxville on September 2, Burnside could now return his attention to the Cumberland Gap.
Frazer and his 2,300-man garrison had little combat experience, yet they had the benefit of a strong natural defense. Frazer's men supplemented this by digging their own trenches. General Simon B. Buckner had given Frazer orders to hold the gap at all cost, yet when Buckner and all his troops were redeployed, no contingency had been formulated for retreat and therefore Frazer continued following his orders from Buckner to hold the gap. DeCourcy's brigade threatened the Confederates from the north, but his brigade alone was not enough to force Frazer out of the gap. Burnside dispatched a second brigade under Brigadier General James M. Shackelford. Shackelford approached from the south and, on September 7, asked for Frazer's surrender. There were still not enough Union troops to convince Frazer to surrender. An ineffectual exchange of artillery followed but that evening Union soldiers captured Gap Springs, the Confederate water supply. On September 8 Burnside personally left Knoxville with a brigade under Colonel Samuel A. Gilbert and marched 60 miles in just over a day. Meanwhile, both DeCourcy and Shackelford sent messages demanding surrender. Attempting to buy time, Frazer met with the two Union commanders separately, but rejected surrender demands from both.
The American Civil War (1861–1865) was the deadliest conflict in American history, killing an estimated 620,000 to 750,000 soldiers and an unknown number of civilians. The Confederate States of America, formed by eleven seceding Southern states, faced the Union in four years of warfare across 23 states and territories. Major engagements included First and Second Bull Run, Antietam (the bloodiest single day in American history, September 17, 1862), Chancellorsville, Gettysburg (July 1–3, 1863), Vicksburg (surrendered July 4, 1863), and Sherman's March through Georgia and the Carolinas (1864–1865). President Lincoln issued the Emancipation Proclamation on January 1, 1863, transforming the war's stated purpose to include the abolition of slavery and enabling the enlistment of approximately 180,000 Black men in the United States Colored Troops. Confederate General Robert E. Lee surrendered to Ulysses S. Grant at Appomattox Court House on April 9, 1865. The war resolved the question of secession and ended American slavery, though Reconstruction would face sustained resistance in its attempt to secure civil rights for formerly enslaved people.
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