 During the Battle of Fredericksburg on 13 December 1862, the 5th New York Battery and Batteries A, B, and C of the New York Battalion served in the Artillery Reserve.The Artillery Reserve was posted on the east bank of the Rappahannock River on Stafford Heights, opposite the town of Fredericksburg, Virginia.Before the Second Battle of Corinth on 3–4 October 1862, William Rosecrans built several lunettes to defend the west side of Corinth, Mississippi.