The Battle of Iuka is fought on September 19, 1862, in Iuka, Mississippi, during the American Civil War.

In the opening battle of the Iuka-Corinth Campaign, Union Maj. Gen. William S. Rosecrans stops the advance of the army of Confederate Maj. Gen. Sterling Price.Maj.

Gen. Ulysses S. Grant brings two armies to confront Price in a double envelopment: Rosecrans's Army of the Mississippi, approaching Iuka from the southwest, and three divisions of his own Army of the Tennessee under Maj. Gen. Edward O. C. Ord, approaching from the northwest.

Although Grant and Ord plans to attack in conjunction with Rosecrans when they hear the sound of battle, an acoustic shadow suppresses the sound and prevents them from realizing that the battle had begun.

After an afternoon of fighting, entirely by Rosecrans's men, the Confederates withdrew from Iuka on a road that had not been blocked by the Union army, marching to rendezvous with Confederate Maj. Gen. Earl Van Dorn, with whom they will soon fight the Second Battle of Corinth against Rosecrans.