I'm trying to identify "Col. Stark's Alabama Cavalry" to, hopefully, find the enlistment records for the following:

Meredith J. Saunders or Sanders
born c1818 SC
1850 Census: Marengo County, AL

Widow Elizabeth Sanders filed for a widow's pension in 1897 in Mobile for his service in "Col. Stark's Alabama Cavalry" but didn't offer anything more specific. I have not found them on the 1860-80 censuses and believe Elizabeth died in Mobile around 1899.

Any ideas?

Thanks,
Scott