On September 3, cheered by local women as they departed, the Sons of Fluvanna (designated as the 1st Fluvanna Artillery) moved from Richmond to join the main Confederate Army stationed at Manassas. Both the 1st and 2nd Fluvanna Artillery were assigned to the same battalion, and served in the 1862 Peninsula Campaign, but were held in reserve at the Second Battle of Manassas and at Sharpsburg. The battery lost a gun and a caisson at the Battle of Shepherdstown covering Robert E. Lee's retreat. In October, the two batteries were consolidated to create the Fluvanna Artillery. The Battery was held in reserves from Fredericksburg to Gettysburg and saw some action in the fall of 1863. The battery saw considerable action during the 1864 Overland Campaign under Capt. John L. Massie, serving from the Wilderness to Cold Harbor.