After Vicksburg surrendered, the battery took part in the Jackson Expedition, advancing to Jackson, Mississippi on 5–10 July and besieging the place on 10–17 July. Cogswell's Battery guarded the Big Black River until 28 September 1863. On that date it moved first to Memphis, then took part in operations on the Memphis and Charleston Railroad in Alabama on 20–29 October. The unit served in the Chattanooga Campaign, fighting in the Battle of Missionary Ridge on 23–24 November 1863. Commanded by Captain Cogswell, the battery was assigned to Artillery, John E. Smith's 2nd Division, XVII Corps. The unit participated in the Knoxville campaign from 28 November to 8 December, marching to the relief of the Federal garrison of Knoxville, Tennessee. The battery was assigned to garrison duty in Alabama from December 1863 to April 1864. There were 106 recruits added to Cogswell's Battery. Most of these men arrived in January–March 1864, though some arrived earlier, and some arrived later. On 11 April 1864 at Huntsville, Alabama, a caisson accidentally exploded, killing four soldiers. Another man died the following day.