Rebecca, The 10TH TN Cavalry served alternately under Generals Wheeler and Forrest, so they rode hard and fought often. They were in the thick of some major battles including Thompson's Station and Chicamauga. You should get your ancestors military record to find out more about his whereabouts, discharge, etc. These records may contain very little information or quite a lot. Just a matter of luck. They will not tell you anything about the soldier's family.

There are number of other good sources, including Tennessee pension records and a survey of TN Confederate veterans made in the early 20th Century.

http://www.floridareenactorsonline.com/10TN.htm