NPS - CW S&SS shows:

T.E. Martin
Regiment Name Mosby's Regt. Virginia Cavalry (Partisan Rangers)
Side Confederate
Company A - Capt James William Foster's Co; organized 6/10/1863
Soldier's Rank_In Private
Soldier's Rank_Out Private
Film Number M382 roll 36

Mosby's Regiment, Virginia Cavalry (Partisan Rangers)

Mosby's Cavalry Regiment, formerly the 43rd Battalion, was organized in December, 1864. The battalion was formed in June, 1863, with five companies, later increased to eight. The unit served behind Federal lines in Northern Virginia and was the most effective command of its kind. The enemy forces were never safe and the area became known as "Mosby's Confederacy." In 1865 the unit was still strong with over 600 effectives, but after General Lee surrendered, Mosby assembled his men at Salem on April 21, and the command disbanded. The field officers were Colonel John S. Mosby, Lieutenant Colonel William H. Chapman, and Major A.E. Richards.

There are four (4) other Martin's listed with the unit:

Martin, C.S.
Co B - Capt William Rawley Smith's Co; organized 10/1/1863
Private Private

Martin, John W.
Co E - Capt Samuel Foker Chapman's Co; organized 12/7/1863

Martin, Thomas
Co A - Capt James William Foster's Co; organized 6/10/1863
Private Private

Martin, William
Co E - Capt Samuel Foker Chapman's Co; organized 12/7/1863