William W. Lillard, age 46, enrolled as a 2nd Lieutenant in Captain George W. McKenzie's Company, Tennessee Cavalry Battalion**, November 1, 1861 at Decatur, Tennessee, advanced to Captain in 1862, paroled at Charlotte, N. C., May 3, 1865
**This company was successively designated as Captain McKenizie's Company Tennessee Cavalry; Company B, 1st (Rogers') Regiment, Tennessee Cavalry; Company C (also called Company B), 3rd Battalion Tennessee Cavalry, and Company C, 5th (McKenzie's) Regiment Tennessee Cavalry.
Lindsley's Military Annalys of Tennessee record him as Commanding Company I.