Grierson's Raid was a Union cavalry raid during the Vicksburg Campaign of the American Civil War. It ran from April 17 to May 2, 1863, as a diversion from Maj. Gen. Ulysses S. Grant's main attack plan on Vicksburg, Mississippi.
Early in 1863, Major General Charles Hamilton, the commander of the Corinth section of Grant's division, suggested what would eventually become Grierson's Raid. Subsequently, due to Hamilton's insistence on procuring a command that would garner him more glory, Hamilton offered his resignation. Grant quickly accepted.
In the Western Theater of the American Civil War, Confederate cavalry raids under commanders such as Lt. Gen. Nathan Bedford Forrest and Brig. Gen. John Hunt Morgan had harassed Union expeditions, namely at the Battle of Parker's Crossroads, where Forrest captured three hundred Union soldiers under Brig. Gen. Jeremiah C. Sullivan, but lost all of the artillery pieces belonging to his own command. The task of drawing the attention of Confederate raiders away from the Siege of Vicksburg fell to Col. Benjamin Grierson, a former music teacher who disliked horses after being kicked in the head by one as a child. Grierson's cavalry brigade consisted of the 6th and 7th Illinois and 2nd Iowa Cavalry regiments.
Grierson and his 1,700 horse troopers, some in Confederate uniforms serving as scouts for the main force, rode over 600 miles (970 km) through hostile territory (from southern Tennessee, through the State of Mississippi and into Union-held Baton Rouge, Louisiana), over routes no Union soldier had traveled before. They tore up railroads and burned crossties, freed slaves, burned Confederate storehouses, destroyed locomotives and commissary stores, ripped up bridges and trestles, burned buildings, and inflicted ten times the casualties they received, all while detachments of his troops made feints confusing the Confederates as to his actual whereabouts, intent and direction. Total casualties for Grierson's Brigade during the raid were three killed, seven wounded, and nine missing. Five sick and wounded men were left behind along the route, too ill to continue. Grierson reported to have killed and wounded 100 Confederates, captured 500, destroyed between 50 and 60 miles of railroad, destroyed over 3,000 stands of arms (a rifle plus all its accompanying kit), and captured 1,000 horses and mules.
Confederate States Army Lt. Gen. John C. Pemberton (1814-1881), commander of the Vicksburg garrison on the east bank of the Mississippi River behind heavily fortified trenches, had few cavalry and could do nothing to stop Grierson from rampaging further east in the state's interior. Around the same period, on April 21, 1863, Confederate cavalry commander Maj. Gen. Nathan Bedford Forrest (1821-1877), had however pursued and captured another Union Army cavalry raider, Col. Abel Streight (1828-1892), further east in Alabama following a different poorly supplied and poorly planned raid (Streight's Raid) by the generally more powerful and well-supplied Union Army.
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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