On May 1, while stationed in the vicinity of Memphis, Tennessee, the battery officially elected its officers. A muster conducted on May5 at Corinth, Mississippi, found 62 men in the battery; it also noted that the battery was armed with four cannons. Union troops had previously occupied positions near the city on May 3, beginning the siege of Corinth. During the siege, Landis's Battery held a strong redoubt with its four cannons, dueling with Union batteries at a range of . The battery also fought in a skirmish in the vicinity on May 28 before the Confederates abandoned the city on the night of May 29/30. Landis's Battery then spent the next several months stationed at various points in Mississippi. In September 1862, Price, now commanding the Army of the West, was preparing for an offensive designed to support the Confederate Heartland Offensive. On September 14, Price occupied Iuka, Mississippi, as part of his movement; additional Confederate forces under the command of Major General Earl Van Dorn were only a four-days' march away. Major General Ulysses S. Grant, one of the top Union commanders in the region, wanted to avoid the possibility of Price and Van Dorn joining forces. To accomplish this goal, Grant sent troops commanded by Major General E. O. C. Ord to attack Iuka from the north, and others under Major General William Rosecrans to attack the city from the south. During the ensuing Battle of Iuka on September 19, Landis's Battery fought as part of Brigadier General Martin E. Green's brigade, assigned to Brigadier General Lewis Henry Little's division of the Army of the West. Although the battery came under hostile fire at Iuka, it did not fire its cannons. Price was able to fend off Rosecrans, and an acoustic shadow prevented Ord from learning of the fight until after it was over. By September 20, the Army of the West had escaped from Iuka.