Marion Light Artillery was organized on Amelia Island, Florida, in June 1861. Later it moved to Kentucky and took part in the fight at Perryville. The company served in S.C. Williams', M. Smith's, and L. Hoxton's Battalion of Artillery, and participated in the campaigns of the Army of Tennessee from Chickamauga to Nashville. It then was involved in the defense of Mobile and was included in the surrender of the Department of Alabama, Mississippi, and East Louisiana. The unit was commanded by Captains John M. Martin and Robert P. McCants.