There are only two muster rolls of his company in which he is listed, however, the Record of Events for his regiment provides some information on casualties suffered during his time in service. They were also involved in other engagements, see:
http://www.rootsweb.ancestry.com/~mscivilw/18thmscav.htm
http://www.mississippiscv.org/MS_Units/18th_Bn_MS_CAV.htm
http://members.cox.net/rb2307/content/Military_Career_of_Volney_Carlisle_Lewis2.htm
B. C. Tucker, Private, Company G, 18th Battalion Mississippi Cavalry*, enlisted February 1, 1864 at Como, Mississippi by Capt. Perry for the duration of the war, with his command surrendering May 4, 1865 at Citronelle and paroled at Gainesville May 12
Company E Stationed at College Hill Station, Mississippi, March-April 1864.
April 12.— Company E engaged in the battle of Fort Pillow, Tennessee at which place Captain Middleton was painfully but not dangerously wounded in the left arm.
Private James L Simmons was killed on the same day, April 12, 1864, while gallantly storming the fortifications.
W. G. Middleton, Capt., killed in action near Tupelo, July 13, 1864
D. M. Wallace, 2nd Lt., Company D, Eighteenth Battalion, killed in action at Harrisburg, Miss., July 14, 1864
Elbert Oliver, 1st Lt., Company K, Eighteenth Battalion, wounded at Franklin, Tenn., November 30, 1864, gunshot fracture of right metatarsus, amputation of right foot by Chaparts method, taken prisoner December 17, 1864
M269: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Mississippi