In April, 1864, the battery was assigned to support the Brigadier General William Lewis Cabell's cavalry brigade of General Fagan's Cavalry Division. The unit participated in the Camden Expedition in the spring of 1864. Lieutenant Zimmerman led one section of Blocher's Battery to support Brigadier General Marmaduke's Cavalry Division. Zimmerman's section of Blocher's Battery participated in the Battle of Elkin's Ferry on April 3, 1864. The battery was involved in the fighting at the Battle of Prairie D'Ane on April 10, 1864, and the Battle of Marks' Mill on April 25, 1864.