2nd Battalion Mississippi State Troops Cavalry Reserves (Montgomery’s),

aka Montgomery’s 2nd Battalion Mississippi State Troops Cavalry Reserves

(from Dunbar Rowland’s “Military History of Mississippi, 1803-1898”; company listing courtesy of H. Grady Howell’s “For Dixie Land, I’ll Take My Stand’)  

Cameron’s Company (raised in Bolivar County, MS) [no company letter designation specified]
Company C -- Yazoo Rangers, aka Gartley’s Company (raised in Yazoo County, MS)

  Rebel Troop, aka Hammonds’ Company (raised in Attala & Choctaw Counties, MS) [no company letter designation specified]

Herndon Rangers (raised in Bolivar County, MS)
               Major -- W. E. Montgomery, June 29, 1864.  Adjutant--A. K, Stafford
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                This unit appears to be identical to the 1st Battalion Mississippi State Troops Cavalry Reserves (Montgomery’s), which see.