After Pea Ridge, the battery was transferred across the Mississippi River to Memphis, Tennessee, and later moved to Corinth, Mississippi. A muster was conducted at the latter location on May 5; the battery's strength at that time was 100 men. As part of Colonel Louis Hébert's brigade, the battery was engaged during early stages of the Siege of Corinth, and saw action at the Battle of Farmington on May 9. After the evacuation of Corinth, the battery was assigned to various points in northern Mississippi. MacDonald was assigned to the Trans-Mississippi Department to lead cavalry; an election held by the battery elevated William Dawson to battery command on September 10.