7-5-1860 Silas TANNER m. Sarah Adeline JOHNSON, Polk Co GA It is reasonable to assume Silas b 1839 or earlier [males had to have parental consent if under 21].
Are there 2 Silas TANNERs who served CW AL Cavalry?
Silas TANNER who served in the AL Cavalry enl 9-1-1864 Rome GA ae 18 b  Cherokee Co AL; deserted 11-20-1864 [when AWOL they were reported as deserted, but may have been KIA or MIA].He is the s/o John/Roma? 1850 Cherokee Co AL I doubt very much he would marry Sarah Adaline JOHNSON at the age of 14.
The only CW pension info I found was Silas TANNER, AL Cav; widow Adeline filed 11-4-1896.Do you have the pension file, or just the app?
Sarah A TANNER 40 , 1880 Cherokee Co AL, does have dau Fannie b c 1866.I'm not sure same person 1900 Calhoun AL as age is off....Adline S TANNER 66 AL [b 4-1834] with son John & family. 7-6-1897 John TANNER m Joanie JOHNSON, Calhoun Co AL